Publicly accessible urban beach entertainment complex including a surf feature with a centerpiece man-made tropical-style lagoon and method for providing efficient utilization of limited use land

ABSTRACT

A publicly accessible urban beach entertainment complex is disclosed, with a man-made tropical, pristine-clear lagoon as the centerpiece of the complex. The lagoon includes a surf feature and surrounding the lagoon are entertainment, educational, sports, and commercial facilities. The complex has a controlled public access and provides the look and feel of a tropical beach with clear waters and sandy beaches. In addition a method for efficiently utilizing facilities and land that are vacant, underutilized, have limited uses, or that are contiguous to or nearby recreational, educational, sports, or commercial venues is disclosed. The method providing a publicly accessible urban beach entertainment complex with a centerpiece man-made tropical-style pristine-clear lagoon having a surf feature. The method allows for generating revenue and increasing efficiency by pairing vacant sites, underutilized sites, limited use land, or sites that are contiguous to entertainment, educational, sports, and/or commercial venues with urban beach entertainment complexes. The complex preferably has a controlled public access, thereby allowing entrance upon payment of a fee.

This application is a Continuation-in-Part of U.S. patent applicationSer. No. 16/588,841, filed Sep. 30, 2019, which is aContinuation-in-Part of U.S. patent application Ser. No. 15/990,314,filed May 25, 2018, which claims benefit of U.S. Provisional ApplicationSer. No. 62/625,190, filed Feb. 1, 2018, and U.S. ProvisionalApplication Ser. No. 62/639,211, filed Mar. 6, 2018, which applicationsare incorporated herein by reference. To the extent appropriate, a claimof priority is made to each of the above disclosed applications.

FIELD OF THE INVENTION

The present invention relates to a man-made publicly accessible urbanbeach entertainment complex having a man-made tropical-stylepristine-clear lagoon as the complex' centerpiece having at least onesurrounding entertainment, educational, cultural, sports, or commercialfacilities, the complex having controlled public access and providingthe sensation and feeling of being at a tropical beach with clear watersand sandy beaches, wherein the lagoon includes a surf feature.

The present invention further relates to a method for efficientlyutilizing facilities and land that are vacant, underutilized, withlimited use and/or are contiguous or nearby recreational, educational,cultural, sports, or commercial venues by providing a publiclyaccessible urban beach entertainment complex with a centerpiece man-madetropical-style pristine-clear lagoon including a surf feature.

BACKGROUND

In the world, there are innumerable land sites, such as vacant land,that are underutilized due to different factors. There are also diverserecreational, educational, sports, and commercial venues that havecontiguous large pieces of land that could benefit from its development.Such sites, with limited or no use, generally have to pay monthly orannual maintenance fees or taxes, with little or no direct incomeresulting from its use. For example, it is estimated that in the U.S.,up to 25% of the total land area in cities is composed of vacant land(according to experts), and it is recommended that such spaces bemanaged more efficiently to meet the current and future requirements ofurban residents. This urban vacant land includes land that can be usedfor future real estate development, among other uses. Additionally,there are sites that have no use, such as greenfields, brownfields, oragricultural or uncultivated land that can be found relatively nearurban centers.

Examples of the diverse recreational, educational, sports, andcommercial venues with contiguous sites noted above are event arenas,museums, amusement parks, water parks, stadiums, golf courses,membership clubs, temporary accommodation facilities such as hotels,zoos, aquariums, shopping centers, university campuses, casinos, cruiseship ports, speed tracks, horse race tracks, and Olympic venues, amongothers.

It has been estimated that there are more than 100,000 of these types ofvenues around the world based on the inventor's research, where a largeportion of them have nearby or contiguous land that is currentlyunderutilized or has limited use, representing a large worldwide marketfor the implementation of new and innovative concepts that efficientlyutilize the aforementioned sites, and that drastically improve andchange the lifestyle of people living in close proximity to these sites.Additionally, many of these venues have large associated infrastructuresuch as parking lots, access routes, and large spaces that areunderutilized or with low utilization rates. For example, some stadiumsare used only once or twice per week, where the rest of the time theirexisting infrastructure has no alternative or additional use. The samehappens in the infield of horse and car race tracks, which often are notused or only used during racing events (i.e., and not for alternative oradditional purposes). In addition, some race tracks have closed and sothe structures are not being efficiently used.

It is also important to note that there are currently severalsignificant trends occurring around the world in connection with retailshopping. More specifically, shopping malls and stores are closing theirdoors at unprecedented rates. This makes available large empty spacesthat can be reinvented and used for other purposes. It is estimated thatone quarter of all shopping malls in the U.S. are expected to shutter inthe next five years (according to predictions by Credit Suisse). In manycases, such spaces are no longer offering what the public is lookingfor, like recreational and cultural activities, a gathering place tospend time with family and friends, additional amenities, and a settingto relax and improve physical and mental health.

Another significant recent trend is that golf courses have gone fromexplosive growth to high closure rates. More than 800 golf courses haveclosed in the U.S. over the last decade, according to Bloomberg. Thereason often proffered is that golf is not a family friendly sport,causing a declining interest from people who are looking for newactivities and experiences to share with their families and friends.Golf course closures leave operators with large pieces of land that maybe abandoned. This creates a large problem where vacant sites may end uptransforming into derelict sites. Again, closures reflect people'schanging preferences for entertainment and leisure, aiming for outdoorrecreational and cultural activities, and treasuring family and friend'stime, looking for a new and dream-like meeting point.

Therefore, the increasing availability of vacant, limited use land,underutilized land or land that is contiguous or nearby recreational,educational, sports, or commercial venues is an untapped market that hashad no innovations over the last years and that could be paired with anewly created complex that appeals to people living around the complexand which leads to more efficient uses.

In addition to the availability of underutilized spaces, urban life andnecessities have also evolved over the years. Publicly accessible openrecreational spaces have decreased due to urbanization and populationgrowth. It is often expressed that living in large cities has becomemore and more stressful. With more than 50% of people in the worldliving in urban areas as mentioned by the United Nations, there is anincreasing and very important need to provide attractive and versatilerecreational spaces, especially outdoors, that can help people get outof their stressful routines and relax in a peaceful, paradisiacalenvironment. According to these trends, the era of gathering in closedspaces such as malls, movie theaters, and confined gyms is waning, witha desire for open and paradisiacal spaces to improve the lifestyle ofpeople around the world.

Paradisiacal and tropical beaches have been found to be one of thepreferred destinations for people all over the world. The desire torelax and enjoy outdoor experiences is universal, especially duringsummer and warmer months. Tropical settings and beaches are one of themost preferred spots among international travelers. Additionally,beaches are very popular for domestic travelers, motivated to get awayfrom normal, everyday life and to relax and rejuvenate in a tropicalparadise. People in general seek to visit and be part of recreationaldestinations, especially close to the sea and beach areas. For example,in the U.S., the shoreline constitutes less than 10% of the total landarea (not including Alaska), but accounts for 39% of the totalpopulation, according to the National Ocean Service. However, many ofthe beaches found in the shoreline are not suitable for swimming, arevery windy have dark sand, and present safety concerns in terms ofcurrents, surf, marine life, rocks, and/or other associated risks. Thiscreates a situation where many people do not swim or practice watersports in or around such beaches.

Instead, people dream of white sandy beaches with tropicalturquoise-colored waters. Their dreams include being immersed in a beachsetting, with the look and feel of tropical environments, enjoying anidyllic lifestyle next to pristine-clear waters with natural wavemovement. Also, in these types of settings, in addition to swimming,practicing water sports is a popular activity demanded by people. Suchwater sports cannot be practiced in backyard or community pools.

Conventional swimming pools simply do not allow for the incorporation ofthese idyllic beach amenities. For the purposes of the presentinvention, and based on its worldwide definition, a conventionalswimming pool is defined as an impervious water body built out ofconcrete or similar materials, and that for its operation requires tofilter the complete water volume contained in the pool 4 times per day,and also requires maintaining a permanent residual chlorine level of atleast 1.0 ppm in the complete water volume according to regulations inFlorida such as Rule 64E-9 from the Florida Department of Health).

Even though a public pool provides a swimmable body of water, it doesnot resolve the key parameters required to generate a beach lifestylelook and feel, an urban beach entertainment complex, and the sensationof being in a tropical setting. Several of the reasons include: (i) veryhigh construction and operation costs, comprising electricity andchemical requirements, which limit their sizes—therefore only smallpools are built; (ii) general use of right angles amd straight lines;(iii) they do not generally have beach areas with sand; (iv) the colorof the water appears artificial and unnatural due to their smalldimensions and low depths; (v) they do not have a natural wave motionsince their sizes do not allow fetch length to create larger and morenatural waves; (vi) they do not enable the practice of water sports dueto their low depths and small sizes; (vii) they have a strong chlorineor chemical smell; (viii) and generally they are not surrounded by atropical or beach-life scenery with docks. In more detail:

-   -   (i) Conventional swimming pools are very expensive to build and        maintain, and they are generally built out of thick concrete        structures.        -   For example, the “Fleishhacker Pool” located in California,            with a surface of 15,000 m², had to be closed in 1971 due to            water quality problems and high costs. There are several            additional examples of this happening around the world.        -   Based on real swimming pool construction costs, an Olympic            sized pool of around 1,000 m² costs about $1.8 million USD            in direct construction costs and uses more than 23,000 kWh            of monthly electricity and more than 25 gallons per day of            chlorine, equivalent to more than $6,000 in direct monthly            operation costs. Escalating the size and volume of such            conventional pools renders extremely high costs of            construction, especially due to the use of a thick concrete            bottom with waterproof paint and large and expensive            equipment to maintain water quality. Therefore, since            escalating the size of conventional swimming pools is            economically and technically difficult, they do not achieve            large enough dimensions to resemble tropical seas and/or to            practice water sports.        -   Operating costs of large pools are high and become            economically prohibitive, due to an intensive electricity            consumption to filter the complete water volume 4 times per            day, and due to the use of chlorine to maintain a high and            permanent chlorine level. Therefore, pools have a very high            carbon footprint, which impacts the sustainability of such            structures.    -   (ii) Public swimming pools are usually built with straight        lines, straight angles and rectangular shaped geometries, which        divert from natural and curved-shaped water bodies that resemble        tropical seas or shores.    -   (iii) Pools do not usually include sandy beach areas.        Conventional pools are usually built out of thick concrete and        coated with paintings or tiles, that does not generate the look        of an idyllic beach with white sandy beaches that resemble that        of the tropics.    -   (iv) The color and tonality of the water achieved by swimming        pools is usually artificial-looking due to their depths. Since        pools usually have depths of up to 1.5 m, the reflection of the        sun from the bottom of the pools do not generate an intense and        deep turquoise color, such as the pristine turquoise color found        in tropical seas.    -   (v) Due to their small sizes, the wave action generated in pools        looks artificial with poor surface water movement. The small        sizes, and specifically the short lengths of pools (longest        distance from one point on the perimeter of the pool to another        point located in the perimeter of the pool) create a situation        where the wind does not influence the surface of a small pool        noticeably. The influence of the wind over a large distance        above the water is called “fetch length”, which influences the        surface wave movement of the water. Small pools with small        surfaces do not allow fetch length to occur and therefore do not        generate larger, more natural-looking waves and wave action.    -   (vi) Conventional pools also do not usually provide the        conditions to practice water sports, as many water sports        require large surface areas and greater depths, which cannot be        attained by conventional swimming pool construction and        operation technologies since it is technically and economically        unviable to build and maintain at a large scale. Water sports        not usually practiced in small pools comprise sailing, rowing,        windsurf, water skiing, cable skiing, use of flow-riders, stand        up paddling, jet skiing, and kitesurfing, among others. For        example, stand up paddle boarding, which is among the fastest        growing watersport in the U.S., cannot be practiced in small        pools since the desired sensation of paddling in a vast space is        not achieved.    -   (vii) Many pools have strong chlorine or chemical smell, since        their operation technologies and worldwide regulations require        them to maintain a permanent and high residual chlorine level in        the water in order to provide proper disinfection. Therefore,        the chemical smell inhibits the illusion of being in a tropical        paradise, and instead conveys the feeling of being in an        artificial setting. Usually, pools need to maintain a minimum        residual chlorine level of 1 ppm, which generates a noticeable        chlorine smell.    -   (viii) Pools are generally not surrounded by tropical or        beach-like scenery such as palm trees, and do not normally have        docks or pontoons, as water sports are not practiced in such        small pools. Therefore, the look and feel associated with        idyllic beach life and a tropical paradise, which includes the        practice of several water sports, is not created.

Based on the above, since life in cities has become more stressful andgoing to a Caribbean or other tropical beach is out of reach for mostpeople (e.g., due to time, money, distance, or other constraints), thepresent invention overcomes, in a new and innovative manner, theaforementioned urban problem of lack of recreational spaces, by bringingbeautiful tropical settings with pristine-clear waters and white sandybeaches to underutilized urban land or sites through a man-made urbanbeach entertainment complex with a centerpiece pristine-clear lagoon.Such entertainment areas are designed to change the lifestyle of peoplearound the world by providing an idyllic beach-life setting thatpromotes relaxation and the enjoyment of pristine waters, by whichconscious or subconscious stress can be reduced and mental and physicalhealth can be improved. Different activities can be held around thecenterpiece lagoon—including recreational, social, cultural, and sportactivities which aim to transform the location into a beautiful,desirable landscape.

Additionally, artificial surf wave generation technologies haveincreased over the last years, where such technologies are beingincorporated generally as stand-alone features directed at a public thatpractices surf or a similar sport. However, such surf generators havenot been incorporated as part of an entertainment complex as the onefrom the present invention, wherein additional facilities and amenitiesare incorporated with the objective to create the meeting point of the21^(st) century.

SUMMARY OF THE INVENTION

The present invention discloses a man-made publicly accessible urbanbeach entertainment complex with a man-made tropical, pristine-clearlagoon as the complex' centerpiece with surrounding entertainment,educational, sports, and/or commercial facilities, the complex havingcontrolled public access and providing the look and feel of a tropicalbeach with clear waters and sandy beaches, the lagoon including a surffeature.

The present invention further relates to a method for efficientlyutilizing facilities and land that are vacant, underutilized, havelimited uses, or that are contiguous to or nearby recreational,educational, sports, or commercial venues by providing a publiclyaccessible urban beach entertainment complex with a centerpiece man-madetropical-style pristine-clear lagoon with a surf feature. The methodallows for generating revenue and increasing efficiency by pairingvacant sites, underutilized sites, limited use land, or sites that arecontiguous to entertainment, educational, sports, and/or commercialvenues with urban beach entertainment complexes. The complex preferablyhas a controlled public access, thereby allowing entrance upon paymentof a fee.

Therefore, according to one aspect of the invention, there is provided apublicly accessible urban beach entertainment complex, the complexcomprising: a large centerpiece lagoon having a surf portion and anon-surf portion, the non-surf portion of the lagoon having a bottom, aperimeter, and a minimum surface area of at least about 1,000 m2, or ofat least about 10,000 m² to recreate a tropical lifestyle look and feel,and wherein a majority of the bottom is constructed with a flexible,plastic material, and wherein the lagoon further includes: at least onebathing zone within the non-surf portion of the lagoon, the bathing zonehaving a zero-entry edge at the perimeter, wherein the bathing zonecomprises a localized disinfection system, whereby an increased chemicalconcentration is provided in the bathing zone; at least one water sportszone located within the non-surf portion of the lagoon, the water sportszone comprising a water depth of at least 1.4, preferably at least 1.8meters at its deepest point; at least one surf portion comprising anartificial surf wave generator configured to generate surf waves in thelagoon; at least one sand beach area and a rest area surrounding theperimeter of the lagoon, wherein the sand of the sand beach area has alight color thereby resembling a tropical beach, and wherein the sandbeach area and rest area have a surface area of at least 2,500 m²; awater supply system, operatively connected to a water supply, forproviding both filling and make-up water for the lagoon; a watertreatment system for treating the water in the lagoon wherein if thelagoon has a surface of less than about 20,000 m2, the water treatmentsystem comprises at least one centralized filtration system having thecapacity to filter the complete volume of water within a 24 hourstimeframe; and for surfaces larger than about 20,000 m2, the watertreatment system is arranged and configured to utilize at least 50% lesselectricity compared to a conventional swimming pool centralizedfiltration system, wherein the filtration capacity and filtration watervolume is at least 50% lower than for a conventional swimming poolfiltration system that filters the complete water volume 4 times perday; a physical barrier surrounding at least a portion of the urbanbeach entertainment complex, the barrier being arranged and configuredto limit individual access to the complex or its centerpiece lagoon; anaccess control system located in at least one portion of the physicalbarrier, wherein the access control system is arranged and configured toselectively permit entry of individuals into at least a portion of theurban beach entertainment complex; and at least one ancillary facilitylocated within the complex, selected from the group of commercial,recreational, educational, cultural, residential, and sports facilitiesin order to allow different events and activities to be held within thecomplex.

According to another aspect of the invention, there is provided a methodfor efficiently utilizing limited use land by creating a publiclyaccessible urban beach entertainment complex, the method comprising:selecting a site with a minimum total surface of 16,000 m2, wherein thesite is selected from vacant land, underutilized sites, limited useland, or land that is contiguous or nearby recreational, educational,sports, or commercial venues, has a minimum surrounding population of500.000 people within a 50-mile radius connected by road access, and hasa water supply with sufficient availability for use at the site;constructing a centerpiece lagoon having a surf portion and a non-surfportion, the non-surf portion of the lagoon having a bottom, aperimeter, and a surface area of at least 1,000 m2, preferably ofbetween about 8,000 m² and about 200,000 m² to recreate a tropicallifestyle look and feel, wherein a majority of the bottom is constructedwith a flexible, plastic material, and wherein at least one portion ofthe lagoon further includes a zero-entry edge resembling a natural beachedge; and wherein the surf portion comprises an artificial surf wavegenerator configured to generate surf waves in the surf portion of thelagoon; establishing at least one sand beach area and a rest areasurrounding the perimeter of the lagoon, wherein the sand of the sandbeach area has a light color thereby resembling a tropical beach, andwherein the sand beach area and rest area have a surface area of atleast 2,500 m²; connecting a water source to the lagoon with a watersupply system, the water supply system providing both filling and/ormake-up water for the lagoon; incorporating a water treatment system fortreating water in the lagoon, wherein the water treatment system isarranged and configured for treating the water in the lagoon wherein ifthe lagoon has a surface less than about 20,000 m2, the water treatmentsystem comprises at least one centralized filtration system having thecapacity to filter the complete volume of water within a 24 hourstimeframe; and for surfaces larger than about 20,000 m2, the watertreatment system utilizes at least 50% less electricity compared to aconventional swimming pool centralized filtration system, wherein thefiltration capacity and filtration water volume is at least 50% lowerthan for a conventional swimming pool filtration system that filters thecomplete water volume 4 times per day; delimiting at least a portion ofthe lagoon, the sand beach area, and the rest area with a physicalbarrier, wherein the area within the physical barrier further creates anurban beach entertainment complex, the barrier being arranged andconfigured to limit individual access to the complex; locating an accesscontrol system in at least one portion of the physical barrier, whereinthe access control system is arranged and configured to selectivelypermit entry of individuals into at least a portion of the urban beachentertainment complex; and establishing at least one ancillary facilitylocated within the entertainment area, selected from the group ofcommercial, recreational, educational, cultural, residential, and sportsfacilities; whereby individual entry fees provide revenue for the urbanbeach entertainment complex, thereby providing an efficient use of afacility or land that has limited use.

Accordingly, embodiments constructed in accordance with the principlesof the present invention provide people all over the world living nearurban centers the possibility of getting away from their routineeveryday lives and enjoying a beautiful beach-like tropical setting witha pristine-clear lagoon with white sandy beaches as its centerpiece.These publicly accessible urban beach entertainment complexes may becomethe meeting point of the 21^(st) century, changing the lifestyle ofpeople around the world.

The publicly accessible urban beach entertainment complex include a surffeature that allows for practicing sports such as surfing, boogieboarding, body surfing and others. In addition, the surf feature mayprovide an ocean beach like sight and sound adding to the tropical beachaesthetic.

These and various other features as well as advantages, whichcharacterize the present invention, will be apparent from reading thefollowing detailed description and a review of the associated drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Referring now to the drawings in which like reference numbers representcorresponding parts throughout:

FIG. 1 shows an embodiment of the urban beach entertainment complexaccording to the present invention, including a referential surf featurein one portion of the lagoon.

FIGS. 2 and 3 show a side schematic view of an embodiment of thezero-entry edge and chemical application system.

FIG. 4 shows a schematic configuration of the urban beach entertainmentcomplex along with its physical barrier, access control system, andother features.

FIG. 5 is a flow diagram describing a preferred sequence for allowing acontrolled access to at least one portion of the urban beachentertainment complex through an access control location.

FIG. 6 is a flow diagram describing a preferred method of practicing thepresent invention.

FIG. 7 is an illustrative population density map by which the desiredarea may be determined in connection with the location of the vacant,limited use, underutilized site, or land that is contiguous to existingamenities or facilities.

FIGS. 8A and 8B shows a top plan schematic layout of an embodiment ofthe urban beach entertainment complex constructed within the centralspace of a horse racecourse.

FIGS. 9A, 9B, 10A and 10B show a top plan schematic layout of anembodiment of the urban beach entertainment complex constructed withinlimited use sites, corresponding to parking lots, in the contiguous siteto the shopping mall.

FIG. 11 shows an embodiment of an access control system.

DETAILED DESCRIPTION

The present invention discloses a man-made publicly accessible urbanbeach entertainment complex with a man-made tropical-style lagoon as thecomplex' centerpiece with surrounding entertainment, educational,sports, and/or commercial facilities, the complex having controlledpublic access and providing the look and feel of a tropical beach withclear waters and sandy beaches.

The present invention further relates to a method for cost-efficientlyutilizing facilities and land that are underutilized or are contiguousto or nearby recreational, educational, sports, or commercial venues byproviding a publicly accessible urban beach entertainment complex with acenterpiece man-made tropical-style pristine-clear lagoon. The methodallows for generating revenue and increasing efficiency by pairingvacant sites, limited use sites, underutilized sites or sites that arecontiguous to entertainment, educational, sports, and/or commercialvenues with the development of urban beach recreational complexes with acenterpiece man-made tropical-style pristine-clear lagoon, wherein thecomplex has controlled public access and therefore allows entrance ofthe public for a fee in at least one section of the complex. Bytransforming such sites into tropical paradises by creating urban beachentertainment complexes with a man-made tropical-style pristine-clearlagoon with white sandy beaches as its centerpiece, efficient use ismade of the sites with revenue resulting from charging an entry fee tothe complex and other revenues resulting from the complex' activities.It will be appreciated by those of skill in the art that the ultimategoal of the publicly accessible urban beach complex is a profitable use.

As referenced herein, a “tropical-style lagoon” is a large water bodywith crystal clear waters, with a water tonality and coloration rangingfrom turquoise to emerald, which is naturally generated in tropicalsettings (i.e., near the tropics) where depths range from 0.5 meters andup to 6 meters or higher. Such tropical-style lagoons have light-coloredbottoms, generally from light colored sand, wherein their depthdifference creates different tonalities within the same water bodies,with clearer waters at shallower depths and more intense-colored watersat deeper depths. These tropical-style lagoons constitute the typicalscenery of the Caribbean as internationally recognized and as known tothe average public.

Also, as used herein, the term “urban” refers to a type of setting andlocation that has road connections and access, and that is surroundedwith a population of at least 200,000 people within a 30-mile radius.

One advantage of the present invention is creating a piece of tropicalparadise in cities in a cost-efficient way, by providing a publiclyaccessible urban beach entertainment complex with a centerpiece largetropical-style pristine-clear man-made lagoon that allows generatingrecreational, cultural, sports, educational, and commercial activitiesaround the lagoon that includes a surf feature; and therefore provide adesirable meeting point in the 21^(st) century.

A further advantage of the invention is providing a method forefficiently utilizing sites such as vacant land, sites that arecurrently underutilized, or that are contiguous or nearby educational,sports, recreational, or commercial venues. The method of the presentinvention transforms such sites into tropical paradises by creatingurban beach entertainment complexes with a man-made tropical-stylepristine-clear lagoon and white sandy beaches as its centerpiece,wherein efficient use is made of the sites with a potential profitresulting from charging an entry fee to the complex (as well as revenuesfrom the complex' other activities).

These cost-efficient publicly accessible urban beach entertainmentcomplexes represent a completely new concept that allow people to visita vacation-like space anywhere in the world, even just a few blocks awayfrom home, providing a solution for the growing demand for newrecreational spaces and beach-like retreats in sites that were not usedfor this purpose before. Complexes constructed in accordance with theprinciples of the present invention transform sites into a recreationalfamily destination, and upgrade any venue into the next generation ofentertainment. For example, if one were to ask 50 years ago where didpeople went to work out, people responded that they went to the park, orthat they went for a run in the street, and when asked today peoplerespond that they go to the gym. In the same way, when people want to goto the beach, they generally have to travel long distances by car or byplane, and have to spend a significant time for transportation. However,the present invention creates a beach that is located close to theirhomes and therefore it will represent a major change in people'slifestyle.

These publicly accessible urban beach entertainment complexes and theircenterpiece large pristine-clear lagoons with a tropical look and feelprovide an incomparable aesthetical landscape, with turquoise coloredwaters of vast dimensions that produce a relaxing and idyllic sensation.Therefore, these settings create an extremely attractive and spectacularlocation, where the surroundings can be used for activities that todayare held in considerably less attractive places and with considerablyinferior overall conditions. Therefore, these urban beach recreationcomplexes, and their centerpiece large pristine-clear lagoons with atropical look and feel should become the meeting point of the 21^(st)century.

It is important to note that the surf feature as part of the centerpiecelagoon is generally treated independently than for the rest of thecomplex, usually having an independent access control system to allowrenting the space for a limited period of time, which allows practicingsurf or similar activities during the rental period of time. Suchfeature is generally treated independently than for the access controlsystem from the urban beach entertainment complex. All future referencesare applied to the non-surf portion of the urban beach entertainmentcomplex and centerpiece tropical-style lagoon.

I. Difference With Existing Locations/Activities

As previously noted, the era in which confined places, such as malls andmovie theaters are used as gathering and meeting points is declining. Bycreating and operating an urban beach recreation complex with a tropicalambiance including a pristine-clear lagoon surrounded by sandy beaches,an incomparable setting for a 21st century meeting place is created.Accordingly, the urban beach recreational complexes may replaceconventional promenades, and public parks with an urban beach settingwhere different cultural, recreational, educational, and commercialactivities will take place.

With respect to shopping malls, as previously mentioned, customertendencies have changed, with consumers spending more on experiencessuch as travel, entertainment and food. This, along with the increasingtrend of online shopping, has led to the closure of many stores andmalls around the world. By having these publicly accessible urban beachentertainment complexes with a man-made pristine-clear lagoon with atropical look and feel as its centerpiece, and incorporating shoppingcenters in its surroundings, this solution can help preserve the mallbusiness by providing more than simply a point-of-sale to customers(e.g., by providing a new and transformational shopping experience). Thecustomers will be able to enjoy a full day at the mall, either shopping,eating, lounging or relaxing in common areas (the term “hanging out” isoften used to describe these sorts of activities in connection with amall). The customers will, at the same time, be able to use alladditional amenities and enjoy a beach day with tropical surroundings.This is unprecedented and it is anticipated to have a considerableimpact on this market, where successful shopping center designs wouldincorporate these urban beach recreation complexes, which compriseentertainment, dining, and leisure components. Shopping centers need toprovide unique and memorable experiences that will keep customers comingback frequently. Therefore, malls that are looking to renew theirofferings and become part of the 21^(st) century meeting point, willfind it desirable to build and incorporate publicly accessible urbanbeach complexes in accordance with the principles of this invention.

Additionally, activities such as jogging and walking have been held inclosed spaces or in public parks with vegetation, but there is noworldwide reference to publicly accessible urban beach settings thatprovide the opportunity to appreciate a beautiful tropical-stylecrystalline lagoon similar to tropical seas.

Still further, there is a growing demand for outdoor weddings in idyllicsettings and a movement away from closed and confined wedding venues.One popular alternative is a tropical beach wedding. Accordingly, apublicly accessible urban beach developed according to the principles ofthe present invention may provide a popular location for weddingceremonies and celebrations.

Other activities and events that have been normally held in lessattractive locations are concerts, which are held either in closedstadiums and arenas, or in open vacant sites that are conditioned onlyfor such events, and generally do not have beautiful landscapes orsurroundings.

A complex constructed in accordance with the present invention willcreate a beautiful setting and include a large number of activitiessurrounding the centerpiece tropical-style lagoon and that will revolvearound it. The features of the complex may include nighttimeillumination, bars and restaurants to meet with friends and family,screens, stages, and amphitheaters to house different recreational,cultural, educational, or sport activities—all leading to an environmentin which it is possible to have a wonderful experience and to improvepeople's lifestyle. In addition, a portion of the lagoon includes a surffeature that is used to provide a surf wave and allow surfing purposes.

II. Difference With Pools and Water Parks

It is important to note that these publicly accessible urban beachentertainment complexes will be very different from conventional waterparks. Current water parks have a completely different concept as theirmain objective is providing slides, rides and water features forvisitors. Such water parks do not provide a tropical environment with abeach-like look and feel, but rather provide visitors a set of rides andexperiences within the park. On the other hand, the publicly accessibleurban beach entertainment complexes of the present invention aim toprovide a centerpiece man-made tropical, pristine-clear lagoon thatenables different recreational, cultural, sports, educational, andcommercial activities to be conducted in its surroundings. Theseactivities simply would not otherwise exist without the centerpiecelagoon. Therefore, instead of having a water park with severalsmall-sized pools and rides operating under conventional swimming pooltechnology, the urban beach entertainment complex provides a meetingpoint of the 21^(st) century by enabling a series of recreational,cultural, sports, educational, and commercial activities to happenaround the centerpiece lagoon with a beautiful and inviting setting.

In terms of the technologies used to build and operate the centerpiecetropical-style pristine-clear lagoon, it is important to understand thatconventional swimming pools do not provide the conditions for theseidyllic beach lifestyle amenities to exist. Even though a pool mayprovide a swimmable body of water, it does not resolve the keyparameters required to generate a beach-like look and feel, an urbanbeach entertainment complex, and the sensation of being in a tropicalsetting.

Additionally, water park costs are much more expensive and considerablyhigher than for an urban beach recreation center as the ones from thepresent invention.

For example, a water park in South Dakota that includes three smallwater features of approximately 1,000 m², 600 m², and 700 m² (2,300 m²in total) using swimming pool technology has an estimated constructioncost of around $5,000,000 (only considering the three water features andassociated equipment), wherein an urban beach entertainment complex witha lagoon of 1.2 hectares (12,000 m²) would have an estimatedconstruction cost of about $1,800,000 (only considering the centerpiecelagoon and associated equipment). It is important to note that thesecosts do not include the surf portion of the lagoon or its requirementsrelated to construction or operation, as such artificial wave generatorsare generally provided by a third party and usually installed in aportion of the centerpiece lagoon. Such surf portion is generally ropedoff or delimited in a way that does not allow access of people from therest of the lagoon into the surf portion.

Additionally, the operation cost of the referred water park is estimatedas $20,000 per month considering electricity and chemicals, wherein theoperation cost of the referred 1.2 hectare centerpiece lagoon (notincluding the surf portion) would be estimated as $4,000 per monthconsidering electricity and chemicals. This is based on a studyconducted by the independent engineering firm Stantec, who designed andbuilt such waterpark located in South Dakota.

Contrary to conventional public swimming pools, these publiclyaccessible urban beach entertainment complexes, with large man-madepristine-clear lagoons have a number of advantages as described in thefollowing Table 1.

TABLE 1 Man-Made Large Pristine Clear Lagoon Conventional (not includingsurf Description Swimming Pool portion) Sizes Small sizes, where Atleast about 1,000 m2, usually the largest water preferably at leastabout parks have swimming 8,000 m²-10,000 m² of pools with areas of1,000 m²-1,500 m² water surface Construction costs Prohibitive for largeLow cost, does not surfaces and volumes require a complete thick usingcurrent materials concrete bottom as and techniques of conventionalswimming swimming pools pool construction standards Electricity use Veryhigh due to At least 50% less than the intensive requirement ofelectricity consumption filtration of the complete from swimming poolswater volume 4 times per day Chemical use Very high due to At least 50%less than the intensive requirement of chemical consumption chemical usein pools to from swimming pools maintain a permanent and high chlorinelevel of 1 ppm in the complete water volume Shapes Artificial lookingdue to Curved shapes, round use of right angles, geometries, naturalstraight lines, and looking rectangular shapes Use of beach areas withVery unusual Yes, in order to create a sand tropical-style look and feelColor of the water Artificial looking color Natural looking color duedue to shallower depths to more intense tonalities caused by deeperdepths Wave motion No natural wave motion Natural wave motion generationdue to small similar to the sea due to sizes and no fetch length fetchlength that enables to generate larger wave the generation of naturalmotion looking waves. Additionally, the surf feature included in atleast a portion of the lagoon (a minority portion, a majority portion orall of the lagoon) provides for additional water sports activities, aswell as additional sight and sound aesthetics. Practice of water sportsNot possible due to small Yes sizes and low depths Chemical smell Yes,high due to the use Not noticeable in most of of a permanent chemicalthe lagoon, significantly residual chlorine levels fewer chemicals areused, producing little to no chemical smell Tropical setting Notcommonly Yes, surrounded by a surrounded by tropical man-made tropicalsettings (unless located in environment an actual tropical environment)Use of docks and piers Not applicable Yes, to access deeper parts of thelagoon to practice watersports and/or contemplate its vastness Look &feel Small artificial pools with Large pristine-clear high concrete use,similar lagoons and white sandy to backyard pools beaches, resemblingthe Caribbean

The aforementioned swimming pool construction and operation technologieshave been always used in water parks. As noted above, water parks havedifferent objectives, construction methods, operation technologies, andmany other characteristics that separate them from the urban beachentertainment complex of the present invention. Several differences ofthe present technology compared to conventional water parks aredescribed in the following Table 2.

TABLE 2 Conventional Water Urban Beach Recreation Description ParkComplex Use Temporal and sporadic use Purpose of meeting point forfrequent everyday use Activities Mostly short rides Cultural, sports,involving water recreational, commercial, and educational activitieswill be found throughout the urban beach recreational complex AdditionalAmenities Basic food and shopping Shopping centers, and facilitiesrelated to the water park restaurants, gyms, bars, event centers, andother facilities overlooking the centerpiece tropical-style lagoon, withthe goal of becoming the meeting point of the 21^(st) century, wheresuch amenities and facilities are arranged and configured to be directedtoward the centerpiece lagoon, and wherein the lagoon includes a surffeature. Cultural events Not applicable Yes, with concerts and othercultural activities within the urban beach recreation complex Hours ofUse Daytime limited to warm Daytime and nighttime weather use withdifferent activities Look & feel Conventional pools with Largecenterpiece high concrete use, pristine-clear lagoon and focused onchildren and white sandy beaches with offering short rides, with thegoal of becoming the rollercoasters, water meeting point of the 21^(st)slides, and similar rides century Use of vertical structures Large useof imposing Low use of vertical vertical structures - e.g., structuresin the non-surf such as water slides and portion of the lagoon similarfeatures Use of watercraft Not found or applicable Yes, the non-surfportion of the lagoon generally allows the use of small and largewatercraft for activities such as sailing, boating, canoeing, rowing,kayaking, among others Practice of aquatic sports Not found orapplicable Yes, such as the use of kiteboards, practicing water skiing(barefoot skiing, cable skiing, jet skiing), flyboarding,paddleboarding, parasailing, wakeboarding, windsurfing, kitesurfing,among others Construction costs Usually relatively Low cost, non-surfshallow pools with thick portion does not require a concrete walls andcomplete thick concrete bottom, with costs up to bottom as required by10 times larger than that conventional swimming of the tropical-stylepool construction lagoons of the present standards invention Watertreatment Use of conventional Use of innovative technologies swimmingpool technologies with lower technology electricity and chemicalconsumption than swimming pools Overall setting Artificial look similarto Non-surf portion has a swimming pools natural look similar to atropical setting Shapes Generally right angles, Curved shapes, roundstraight lines, rectangular geometries, natural shapes, artificiallooking looking Use of beach areas with Very unusual Yes, in order tocreate a sand tropical-style look & feel with the beach areas andadditional rest areas having a surface of at least 2,500 m² Wave motionNo natural surface wave Allows natural wave motion generation due tomotion similar to the sea small sizes and no fetch due to fetch lengththat length to generate larger enables the generation of wave motionnatural looking waves. Also, a surf feature is included, providingadditional wave sights and sounds in at least a portion of the lagoon.Overall setting Not commonly Yes, surrounded by a surrounded by tropicaltropical environment and settings the use of docks and piersRecreational, social, Not applicable Yes cultural meeting point

By creating these publicly accessible urban beach entertainmentcomplexes and generating a beach lifestyle anywhere in the world in acost-efficient, sustainable way, it may be possible to generate valueand increase the overall appraisal of the contiguous or nearby sites. Inaddition, the creation of these complexes may thereby also increase thevalue of nearby buildings, houses, and any other facilities or amenitiesthat are close to the complex. Appraisal may be even higher when thereare commercial or residential buildings, such as temporary accommodationfacilities like hotels overlooking the urban beach recreational complexand its tropical-style pristine-clear lagoon directly, due to thebeautiful scenery and the sensation of being on a beach-front property.The urban beach recreational center may also create and increase valuein the entire zone where it is located, as it increases urban value dueto the creation of beach-life close to people's homes.

III. Urban Beach Entertainment Complex and Lagoon Parameters

According to the present invention, a man-made publicly accessible urbanbeach entertainment complex is provided, wherein the complex comprises acenterpiece large tropical-style pristine-clear lagoon with a tropicallook and feel.

Additionally, at least a portion of the centerpiece tropical-stylelagoon includes at least one wave generating means for providing a surfarea over at least a portion of the lagoon. Therefore, the lagoon willbe divided into a surf portion and a non-surf portion, wherein the surfportion generally houses the artificial wave generation equipment andencompasses the area where surf waves are generated. By locating theartificial surf wave generating means in an appropriate area of thelagoon, the resulting surf waves may be used for surfing, boogieboarding and body surfing among other activities. The artificial surfwave generating means is configured to generate surf waves by using thesame water from the artificial pristine clear lagoon, and is installedin a portion of the lagoon. Further, preferably such portion of thelagoon for generating surf waves and practicing surf does not exceed 50%of the total lagoon area. Based on the configuration of such surf areaswithin the centerpiece lagoon, the generation of such surf waves mayalso provide water movement in the beach areas, recreating a naturalsmall and aesthetic wave movement.

The non-surf portion of the tropical-style pristine-clear lagoonaccording to the urban beach entertainment complex of the presentinvention has a bottom, a perimeter, and a minimum surface of at leastabout 1,000 m2, preferably at least about 8,000 m2-about 8,000 m²-10,000m² in order to create a beach lifestyle and a tropical look and feel inthe publicly accessible urban beach entertainment complex. The use ofsmaller lagoons would not mirror a tropical setting. Instead, it wouldresemble a conventional backyard or hotel swimming pool that does notprovide the conditions necessary to feel immersed in an idyllic beachlifestyle. In an embodiment of the invention, locations that may haveincreased prices per square meter of land, or locations that have highpopulation rates and therefore there is less land available for buildingthe urban beach recreational center of the present invention, the largecenterpiece lagoon may have smaller sizes. Preferably, the largecenterpiece lagoon has a minimum size of about 1,000 m2 provided thatthe complex is located in area with high population density that resultsin low availability of space or higher land prices per square meter,among other factors.

Additionally, the tropical-style lagoon has a maximum surface of about200,000 m² since larger surface areas do not result in the desired lookand feel. For example, when the lagoon areas surpass 200,000 m² and aperson looks toward the opposite shore, he or she may not see theopposite waterfront area along with additional facilities and amenities.Thereby, the desired waterfront recreational experience as disclosed inthe present invention is not created. It will be appreciated by those ofskill in the art that the lagoon may be arranged and configured in sucha manner as to have a length which is longer than a width. In such aninstance, larger sizes may be constructed while still achieving thedesired look and feel.

Turning now to FIG. 1, a representative urban beach recreational complex1 with a centerpiece tropical-style man-made lagoon 2 is illustrated.The lagoon 2 comprises at least one zero entry beach area 3 a, a bathingzone 3 b, and a water sports zone 3 c, each of which are located withinthe large tropical-style man-made lagoon 2. FIG. 2 illustrates aschematic side view of an embodiment of the zero-entry beach edge 3 a.

Now with reference to FIGS. 1 and 2, the bathing zone 3 b is adjacentthe zero-entry beach edge 3 a, wherein the zero-entry edge preferablyresembles the natural, soft slope of a tropical beach or a natural lake.The zero-entry edge creates an entry into the lagoon starting generallyat an elevation slightly above the mean water level 4 a, passing throughthe mean water level at the lagoon perimeter 4 b and continuing to dropbelow the mean water surface toward the center 4 c of the lagoon. Theslope of the zero-entry edge, represented by the angle a designated at 5in FIGS. 2 and 3) is defined by the angle between the horizontal line(generally parallel to the mean water surface) and the sloped beachentry. Preferably the angle is between 5% and 30%. This range generallyresembles natural beach edges with soft slopes and provides people onthe beach area 6 and bathers an unobstructed and good view of the vastcrystal-clear waters.

Also, the bathing zone 3 b includes a localized disinfection system thatprovides an increased chemical concentration in such zone. The localizeddisinfection system comprises a dispensing outlet arranged andconfigured to apply disinfecting chemicals to the water volume withinthe bathing area. The localized disinfection system is best seen in FIG.3 wherein a perimeter chemical application system 7 a and bottomchemical application system 7 b are shown. The chemical applicationsystem includes one or more systems selected from the group comprisingnozzles, injectors, jets, piping, and inlets.

The chemical application system may be located in the perimeter of thelagoon and generally bounded by the swimming zone, whereby the primaryinfluence of the disinfecting chemicals is mainly within the swimmingzone. The chemical application system may be preferably located in thebottom of the swimming area, including a plurality of dispensingoutlets, with the dispensing outlets being located at the bottom of thelagoon within the swimming zone, whereby the primary influence of thedisinfecting chemicals is mainly within the swimming zone. There canalso be combinations of perimeter chemical application systems 7 a andbottom chemical application systems 7 b. It will be appreciated that thenumber and specific location and configuration of the selected chemicalapplication system is best defined on a case by case basis, taking intoaccount the potential number of bathers, water volume, water flowswithin the swimming area into the rest of the tropical-style lagoon,among others.

Referring again to FIG. 1, the water sports zone 3 c comprises a minimumwater depth range of at least greater than 1.4 meters, preferably atleast 1.5 meters and preferably greater than 1.8 meters. This minimumdepth allows the practice of water sports that would not be possible inconventional small-sized swimming pools. The water sports zone can havea variety of different slopes at the bottom, depending on its design andconfiguration. With total lagoon 2 size between 10,000 and 200,000 m², aseries of water sports can be practiced in the water sports zone 3 c,such as sailing, boating, canoeing, kayaking, tubing, water skiing(barefoot skiing, cable skiing, jet skiing,), flyboarding,paddleboarding, parasailing, rowing, wakeboarding, windsurfing,kiteboarding, kitesurfing, among others. Preferably, for practicingaquatic sports such as water ski and similar, the size of the lagoon 2must be approximately 15,000 m2 or more. Also, the artificial wavegenerator 25 is configured to generate surf waves in at least a portionof the lagoon referenced as the surf portion 26.

As previously mentioned, conventional swimming pools located in waterparks are small, usually in the range of 1,000-1,500 m², with maximumdepths of generally less than 1.5 meters. Therefore, they do not conveythe feeling of being in the beach or generate a beach lifestyle, and donot allow the practice of several water sports. On the contrary, thetropical-style pristine-clear lagoon 2 constructed in accordance withthe principle of the present invention, in the deepest part of the watersports zone 3 c, has a minimum bottom depth of 1.4 meters, preferably1.8 meters—and in much of the water sports zone 3 c are often evendeeper. This allows practicing innumerable water sports with variouscraft that are not found in conventional swimming pools.

Referring now to FIGS. 1 and 4, several possible embodiments of acomplex are shown, with similar items and structures identified withsimilar designations. In the various embodiments, at least one sandbeach area 6 is provided, which surrounds the large tropical-stylepristine-clear lagoon 2, wherein the sand has a light color resembling atropical beach. In a preferred embodiment, the sand colors are similaror in the range of the following colors according to the RAL colorscale: RAL 9001, RAL 9002, RAL 9003, RAL 9010, RAL 9016, RAL 9018, RAL1001, RAL 1014, RAL 1004 or similar colors.

The sandy beach areas 6 are generally configured directly in front ofthe zero-edge beach edge 3 a located in at least a portion of theperimeter of the centerpiece lagoon, in order to provide the feeling ofcoming out of the water onto the beach. The beach areas 6 and additionalrest areas have a minimum surface are to allow recreational,educational, sports, and commercial activities. The beach areas 6 andadditional rest areas have a surface preferably of at least 2,500 m²which allows significant use of such area for different activities suchas concerts, plays, screenings, sports, among other activities andevents.

Also, contrary to conventional pools that have hard edges and closedshapes, the non-surf portion tropical-style centerpiece lagoon ispreferably designed to have curved shapes with round corners that areassociated with natural water bodies and beaches, conveying the feelingof being in an idyllic beach paradise.

Further, in an embodiment of the invention at least one portion of theurban beach entertainment complex comprises the use of trees and plantsto create a tropical look. In a preferred embodiment, the vegetation 8resembling a tropical setting is located in the beach areas oradditional rest areas surrounding or nearby the zero-entry beach edges 3a and/or sand beach areas 6.

Referring to FIG. 4, the urban beach entertainment complex 1 furtherincludes a water supply system 9 operatively connected to a watersupply, comprising a source, pumps, devices, and other appropriate fluidconduits for supplying filling and make-up water to the lagoon 2. Itwill be appreciated by those skilled in the art that the devices andconduits for supplying filling and make-up water to the lagoon includepiping, nozzles, waterfalls, inlets and outlets, and valves, amongothers. The water make-up system is preferably arranged and configuredto supply filling and make-up water to the lagoon in order to maintain awater volume of at least 80% of the designed water volume permanently inthe water body.

The make-up water must have iron and manganese concentrations of up to 2ppm in order to provide the centerpiece tropical-style pristine-clearlagoon with suitable water that will not change its appearance whenundergoing treatment. It will be appreciated by those skilled in the artthat, for example, water with high iron and manganese concentrationscause a very noticeable color change when being treated. Also, turbidityof the make-up water should not be higher than 8 NTU in order to avoidhaving cloudy water (i.e., such water will not provide a tropical lookand feel and transparency). Since the levels of filtration in thecenterpiece lagoon of the present invention are lower than the ones usedin swimming pools, it is important to control the inlet water qualityand that it complies with the above parameters.

The man-made tropical-style pristine-clear lagoon 2 of the presentinvention, is preferably the centerpiece of the urban beach recreationalcomplex 1 and is built and maintained with innovative technologies thatachieve low construction and operation costs. Such costs are up to 10times lower than construction costs associated with conventional thickconcrete or tile bottoms used in swimming pools. Further, such operationcosts are up to 10 times lower than conventional swimming pool operationcosts that require filtration of the complete water volume 4 times perday.

By having low construction and operation costs, and at the same timeallowing to achieve an aesthetically pleasing and high physicochemicaland microbiological water quality, a publicly accessible urban beachentertainment complex 1 is provided in a cost efficient way.Accordingly, the method of the present invention provides acost-efficient use of sites that are vacant, previously underutilized,or that are contiguous to, or nearby recreational, educational, sports,or commercial venues, providing thus profitability to such sites.

In order to provide a cost efficient urban beach entertainment complex,the construction methods for building the non-surf portion of the lagoonshell must typically not include a concrete bottom of the type used inconstruction methods for swimming pools in the majority of the lagoon.Conventional swimming pool construction requires that the shell of thepool (bottom and walls) is built out of concrete with a specificthickness, generally with a minimum of 2 to 6 inches, and that may bereinforced in order to provide structural stability and resistance basedon the type of soil found below the pool. Also, such bottom concrete isgenerally either painted with a waterproof coating or is covered withtiles, making the construction process more difficult and expensive.

On the other hand, the present invention requires that a large portionof the bottom of the large centerpiece non-surf portion of the lagoon iscovered with a flexible plastic material to provide waterproofing andcontainment properties. Preferably, the bottom surface of the watersports zone within the tropical-style pristine-clear lagoon isconstructed such that at least 80% of its surface is covered with aflexible plastic material. The plastic material is selected from thegroup comprising polyvinyl chloride, polyethylene, rubbers,polypropylene, among others. In the preferred embodiment, polyethylenemay be utilized. The color of the plastic material ranges from purewhite to a light blue or light brown color.

In certain embodiments, and preferably in the case that the surface ofthe large centerpiece lagoon is less than about 20,000 m2, othermaterials can be used instead of, or in combination with the flexibleplastic material in the bottom of the large centerpiece lagoon toprovide waterproofing and containment properties. Thus, portions of thebottom of the large centerpiece lagoon can be instead constructed withmaterials having waterproofing and containment properties such asconcrete, shotcrete that is thinner than for conventional swimming poolconstruction, plaster, stucco, or combinations thereof.

While the plastic liner is a preferred material in terms of cost, insome environments, or if cost is no object, concrete or similarmaterials may be used in all or portions of the centerpiece lagoon.

It is also important to mention that solutions including concrete orshotcrete generally have high maintenance schedules, and may requirere-coating or cleaning such surfaces while not being submerged in waterperiodically, which would result in having to drain and refill the largewater bodies which may take months to finalize. Therefore, the use ofplastic materials and its less requirement for non-submerged maintenancerepresents an advantage compared to other solutions.

The bottom of the tropical-style lagoon may be additionally constructedwith different materials to provide additional layers. In one embodimentof the invention, the bottom of the large lagoon is covered with amineral layer that creates an essentially stagnant water body forholding the water volume. In another embodiment of the invention, thebottom can be covered with a thin layer of shotcrete, with a thicknessof less than 6 inches.

It is important to note that currently, technologies exist for buildingthe non-surf portion of the large tropical-style centerpiece lagoon forless than $600,000 (US) per acre (such amount will vary based on thecountry, total size, and specific local variables), and to maintain anexcellent physicochemical and microbiological water quality usingminimum amount of chemicals and energy, in a cost-efficient manner. Asnoted above, and in comparison, a conventional water park located inSouth Dakota, U.S., with three relatively small water features of acombined area of 2,300 m² has a total direct construction cost of morethan US$5 million (resulting in more than US$20,000,000 per hectare in adirect comparison and only considering the water feature surfaces). Thisis based on a study conducted by the independent engineering firmStantec, who designed and built such waterpark located in South Dakota.

Also, the publicly accessible urban beach entertainment complexcomprises a low-cost treatment system that provides a water treatmenttechnology for treating the water in the lagoon wherein if the lagoonhas a surface less than about 20,000 m2, the water treatment systemcomprises at least one centralized filtration system having the capacityto filter the complete volume of water within a 24 hours timeframe; andfor surfaces larger than about 20,000 m2, the water treatment system isarranged and configured to utilize at least 50% less electricitycompared to conventional swimming pool centralized filtration anddisinfection systems. The water treatment technology comprises afiltration system that has a capacity and filtration water volume fortreating the water in the lagoon, wherein if the lagoon has a surfaceless than 20,000 m2, the water treatment system comprises at least onecentralized filtration system having the capacity to filter at least thecomplete volume of water within a 24 hours timeframe; and for surfaceslarger than about 20,000 m2, the water treatment system is at least 50%smaller than for conventional swimming pool filtration systems thatfilter the complete water volume four (4) times per day.

For example, using conventional pool technology, for a 30,000 m² lagoonwith a volume of 45,000 m³, the filtration water volumes would be180,000 m³ per day (in order to achieve filtration of the complete watervolume four (4) times per day=45,000m³×4=180,000 m³/day). On the otherhand, for sizes larger than about 20,000 m2, the present invention'spreferred water treatment technology includes a filtration system thatfilters at least 50% less than that of a conventional swimming poolfiltration system. Following the same example, the filtration capacityof the present invention and water volume would be a maximum of 90,000m³/day, thereby achieving considerable electricity and equipmentsavings.

In certain embodiments of the invention, the filtration of the largewater body is performed so that the complete water volume is filtered,where conventional swimming pools need a high number of inlets andoutlets in order to effectively circulate the water through thefiltration system so that the complete water volume is filtered.

In an embodiment of the invention, the centerpiece tropical-style lagoonuses a modular treatment system 10, wherein the modular treatment systemincludes one or more elements selected from the group comprising acontainerized machine room, skid mounted systems, and/or water treatmentequipment. In a preferred embodiment, such modular treatment system isarranged and configured to be plug and play. This facilitates itsconnection to other elements, equipment, systems, piping, andstructures. In another embodiment of the invention, the modulartreatment system 10 is portable and can be deployed and installed onsite in a short period of time. As another advantage, the modulartreatment system 10 may be operated on a temporal basis, depending onseasonality, its configuration and demand. An example of a preferredmodular treatment system which may be utilized in connection with thepresent invention is a set of containers that have been manufactured inorder to house the different systems and equipment that can bemanufactured locally or outsourced from other cities or even countries.

In a preferred embodiment of the invention, the low-cost treatmentsystem does not generate a noticeable chemical smell in most of thelagoon as in conventional swimming pools that have a permanent 1 ppmresidual chlorine level throughout the complete water volume. Sincethere is practically no noticeable chemical smell in most of the lagoon,it helps achieve the object of providing the look and feel of an idyllicbeach with white sandy beaches resembling the Caribbean beaches. In apreferred embodiment of the invention, the lagoon does not present anoticeable chemical smell in its majority as in conventional pools thatmaintain a permanent residual chlorine level of 1 ppm provided that thelagoon has a surface area larger than about 20,000 m2.

In another embodiment of the invention, the water treatment technologyfor operating the centerpiece tropical-style lagoon must use at least50% less chemicals than a conventional swimming pool disinfection systemthat requires maintaining at least 1 ppm of chlorine permanently in allof the water volume, such as conventional public swimming poolregulations from the CDC (U.S. Center for Disease Control), Rule 64E-9from the Florida Department of Health, and Title 22—Division 4—Chapter20 of the California Code of Regulations, among others.

Still further, the centerpiece tropical-style lagoon 2 may preferablyhave a natural surface wave motion due to its large surface. Thehorizontal distance of the lagoon 2 in the direction of the wind cancreate a fetch length, where the fetch length is the horizontal distancealong the open water over which the wind blows and generates waves.Therefore, the look of the tropical-style lagoon's waves allows toachieve a natural look since the waves are similar to the sea—and arevery different to the ones created in conventional small-sized swimmingpools. Depending on the horizontal distance that is parallel to the windblowing over the lagoon, the waves created over the lagoon will behigher and similar to the water movement over the sea. The wave heightincreases exponentially with the fetch length and wind speed, which isan effect not achievable in conventional pools with small sizes. Thiswill be complemented to the use of an artificial surf generator in aportion of the lagoon, which will also help generate surf waves thatwill help to provide movement to the surface of the water in the lagoon.

In an embodiment of the invention, the tropical-style pristine-clearlagoon operates in an essentially closed cycle. In this embodiment, thewater volume is not significantly renewed through recirculation with awater source (e.g., a well) and/or an open body of water or river.

In an embodiment of the invention, the tropical-style pristine-clearlagoon has a minimum vertical transparency of 1.2 meters in order toresemble the tropical seas with pristine-clear waters when the surf wavegenerator is not operational. Such depth allows generating an intensecolor with crystal clear waters, where the bottom 11 of thetropical-style lagoon allows providing such intense color and tonalitydue to the effect of the sun's reflection over the bottom and due to thetransparency of the water.

There are new and innovative methods for building and maintaining largewater bodies with excellent microbiological and physicochemical waterquality and high transparency for different uses, which have beenprotected by patents in the U.S. and around the world, such as describedand shown in the following granted U.S. Pat. Nos. 7,820,055, 8,070,942,8,062,514, 8,790,518, 9,708,822, 9,470,007, 9,080,342, 8,465,651,9,062,471, 8,753,520, 9,957,693 and 9,470,008. Each of the foregoingpatents are hereby incorporated by reference and made a part hereof.

Such innovative methods, systems, and apparatuses have very lowconstruction costs, very low operation costs due to the use of minimalamounts of chemicals and energy for maintaining water quality, and as analternative, may be used for building and/or maintaining the largepristine-clear lagoons with a tropical look and feel. These patentedmethods, systems, and apparatuses can be used for building and/ormaintaining the large pristine-clear lagoon 2 either by using alltechnologies, or some of them, or parts as described in suchtechnologies.

The aforementioned incorporated patents describe the various operationsand processes for treating the water in large lagoons in a manner whichefficiently and economically maintains the water. While reference shouldbe had to such patents for detailed descriptions, a brief description isnext presented as a representative method to maintain the water in thepublic access lagoon. First, the water treatment and filtration processrequires collecting water and storing such water in a container having abottom able to be thoroughly cleaned by a suction device. Second, duringa 7 day interval the process requires treating the water in thecontainer by periodically adding disinfectant agents to said water toestablish an ORP of at least 500 mV for a period of time dependent onthe temperature of the water being treated. Third, the method requiresactivating the operation of mobile suction means in order to suction aportion of said water in the container containing settled solids toprevent the thickness of settled material from exceeding 3 mm. Lastly,the method requires filtering such portion of water suctioned by themobile suction means and returning the filtered water to said container.Using these processes, at least 50% less filtration capacity and watervolume may be filtered compared to a conventional swimming poolfiltration system are utilized that requires filtering the completewater volume 4 times per day.

It is important to mention that the previously mentioned patentedtechnologies have been used in real estate developments which havecompletely different concepts and configurations. In addition, suchdevelopments do not consider massive public usage and do not create ameeting point of the 21^(st) century. Instead, the use in real estatedevelopments is very different since such lagoons are intended for useby owners and residents, do not have a public controlled access (e.g., aticket entry fee) for large scale use, and may not be located in siteswith a large urban population concentration. Therefore, they cannotgenerate the meeting point of the 21^(st) century with surroundingamenities and facilities such as restaurants, amphitheaters, stages,kiosks, rental centers, shopping centers, gyms, promenades, bars, coffeeshops, among others. Accordingly, the model for real estate is quitedifferent. However, if there is a real estate development, hotel, orprivate development near the publicly accessible urban beachentertainment complex, or in one zone in the perimeter of thecenterpiece tropical-style lagoon that has private access to such zone,the principles of the present invention require at least one publicaccess zone—that is separated from such developments—and that has acontrolled access for public use as a mixed use.

Therefore, as it has been mentioned thorough the specification, swimmingpool technologies cannot be scaled into large water bodies. For largewater bodies there are some other technologies used—such as the onesused in surf lagoons, aesthetic or ornamental lagoons—but which do notachieve the pristine clear nor water quality conditions of the presentinvention, and would not be able to create the urban beach entertainmentcomplex of the present invention.

In an embodiment of the invention, evaporation control chemicals areadded to the lagoon's water, which allows reducing natural evaporationup to 50% compared with natural evaporation rates. It will beappreciated that the chemicals must be approved for use in recreationalwater bodies. Examples of a preferred evaporation control chemicalinclude alcohol based evaporation control chemicals or silicon basedevaporation control chemicals, which create a non-visible layer on topof the surface water layer and therefore reduces evaporation by avoidingthe direct contact between the water surface and the surrounding air.The control chemicals operate under different temperatures and are ableto withstand wind conditions. The evaporation control chemical isrequired to be NSF (National Sanitation Foundation) approved for use inrecreational water bodies, either being approved under NSF 50 (forswimming pool chemicals) or NSF 60 (for drinking water chemicals). Anexample of a preferred evaporation control chemical is the Heatsavr®Crystal Lagoons Formula, manufactured by the company Flexible Solutionsof Canada. Such chemical may be added manually, by the water make-upsystem 9 and/or the modular treatment system 10.

The urban beach entertainment complex also comprises at least one accesscontrol system 12 which preferably limits and controls user access on adaily basis to at least a portion of the complex. The access controlsystem can be located anywhere within the publicly accessible urbanbeach entertainment complex but preferably is located in at least oneportion of the physical barrier 16. The access control system 12includes one or more access control locations 13 that have a controlsystem 14 to allow controlled entry to the public through such location.Such control system may include gated entries, turnstiles, biometricsystems, access readers, security barriers, biometric systems, amongothers. In a preferred embodiment, the control system comprises a gatedentry with a turnstile. In an embodiment, the access control system isconfigured to permit entry of individuals into at least a portion of thelarge centerpiece lagoon, or into the at least one ancillary facilitybased on information received by an ID, an ID card, an entry card, awearable bracelet, by association to an admissions program, throughmembership, as guests, with seasonal passes, by participating inactivities or facilities located within the same complex, or by a mobilephone carried by the individuals. In another embodiment of theinvention, the ancillary facility is a temporary accommodation facilitythat, when a user is registered as a guest or visitor to such facility,may have also access to at least a portion of the large centerpiecelagoon. For example, the fee of the ticket to access the largecenterpiece lagoon can be included in the fee to access the complex,such as the fee to access an entertainment facility like a water park,zoo, amusement park, or a commercial facility such as a hotel.Additionally, FIG. 5 shows a sequence 15 in which steps 15 a through 15c allow to perform a controlled access upon payment of a fee into atleast a portion of the urban beach entertainment complex.

FIG. 4 shows a schematic of an embodiment of the present invention,where a physical barrier 16 limits the entry of people to the urbanbeach entertainment complex 1, and allowing access to the complexthrough the access control locations 13.

The public will access the urban beach entertainment complex through theaccess control locations 13, as the rest of the limits of the urbanbeach entertainment complex are required to be limited physically toavoid non-controlled access.

FIG. 11 shows an embodiment of the access control system 12 showing apoint of sale 24, used when people are paying the entry fee. In anotherembodiment, people may use their pre-purchased tickets or seasonalpasses to access at least a portion of the urban beach entertainmentcomplex, and may not require paying an entry fee on site. In the shownembodiment, a person buys a ticket on site, then optionally passesthrough a security screening 23, and then uses one of the access controllocations 13 comprising at least one control system 14, in this case aturnstile, to access the urban beach entertainment complex.

The access control system is configured to allow public access to thecomplex, and requires that a specific barrier is employed. Such barrieris defined as a physical limitation structure implemented at the limitsof the urban beach entertainment complex, or the portion of it that willbe controlled for access. The barrier may include one or morecombinations of elements selected from the group comprising fences,walls, moats, natural vegetation, buildings and portions of buildings,or other types of barriers in order to keep the public from accessingthe urban beach entertainment complex 1 through a location other thanthe access control system 13 locations. It will be appreciated that thebarriers will vary from complex to complex depending on the location andexisting structures (if any). It will also be appreciated that one wayemergency exits may be provided in areas of the barriers and/or exitswhich generally trigger warning horns and sirens.

Preferably, the access control system is configured to allow access toat least 500 people per hour into the urban beach entertainment complex1, or to a portion of the same. For example, for an urban beachentertainment complex 1 with a total area of 40,000 m², the accesscontrol system 12 may include two different access control locations 13,each one having at least four control systems 14 such as turnstiles thatallow the public to go through such turnstiles and access the urbanbeach entertainment complex at a combined rate of at least 500 peopleper hour. Preferably at least one of the control systems 14 and accesscontrol locations 13 can be opened or closed depending on public demand.

The urban beach entertainment complex also includes at least oneancillary facility selected from the group of commercial, recreational,educational, cultural, residential, and/or sports facilities surroundingthe centerpiece tropical-style man-made lagoon in order to allowdifferent activities to be held within the urban beach entertainmentcomplex. The ancillary facilities 17 are selected from the groupcomprising restaurants, shopping centers, event centers, gyms, stores,sport facilities 17 e, and educational or cultural venues based on itsconfiguration, among others. Ancillary facilities 17 are represented inFIG. 1. Such ancillary facilities and amenities may be sourced from athird party.

The urban beach entertainment complex further preferably includes atleast one beachfront amphitheater with stages and/or spaces for housingand/or showcasing different events, educational activities, concerts,cultural activities, sport events, and similar content. Also, the urbanbeach entertainment complex may comprise at least one large screen forshowcasing movies, sport events, conferences, simulcasts, live streamingof content, e-sports, educational activities, events, and similarcontent.

The urban beach entertainment complex from the present invention mayalso include an illumination system 18 (best seen in the perimeter ofthe lagoon 2 in FIG. 4), wherein the tropical-style lagoon isilluminated in order to allow its use at nighttime or under enclosedstructures. Underwater illumination allows the clear delimitation of theperimeter of the lagoon 2 and also illuminates the water throughunderwater lights that create a completely new aesthetic look of thenightlife beach ambiance. The illumination system 18 comprises LEDunderwater strip lights or underwater spot lights. The illuminationsystem may be used throughout the complete perimeter of thetropical-style lagoon 2, or only in some portions of the lagoon. Anembodiment is depicted in FIG. 4, wherein the illumination system 18 isused on a portion of the lagoon 2 perimeter.

Docks 19 (best seen in FIG. 4) may be provided within the pristine-clearlagoon, which is not the case in swimming pools, since thetropical-style pristine-clear lagoons allow the practice of aquaticsports and require docks to access deep portions of the lagoon. FIG. 4depicts the use of docks 19 within the tropical-style lagoon 2.

IV. Description of Method

Referring now to FIG. 6, a method of the present invention 20 comprisingsteps 20 a to 20 g provides a method for an efficient use of facilitiesand land that are vacant, underutilized, or are contiguous or nearbyrecreational, educational, sports, or commercial venues by providing apublicly accessible urban beach entertainment complex with a centerpieceman-made tropical-style pristine-clear lagoon. The method provides for arevenue opportunity allowing for the creation of publicly accessibleurban beach entertainment complexes that are be located in underutilizedor vacant sites with specific population density and accessinfrastructure, with the objective of generating the meeting point ofthe 21^(st) century.

The method of the present invention comprises searching and defining asite that has been underutilized or that has no use, wherein the siteselection is a key part of the method. Sites that can be selected forthis purpose comprise vacant land, underutilized land, and sites thatare contiguous or nearby diverse venues, such as recreational,educational, sports, and commercial venues.

Recreational, educational, sports, and commercial venues that may haveunderutilized contiguous sites comprise event arenas, amusement parks,water parks, museums, stadiums, golf courses, membership clubs, zoos,aquariums, shopping centers, university campuses, casinos, cruise shipports, speed tracks, horse race tracks, Olympic venues, among othersites.

The site according to the method of the present invention mustpreferably have a minimum surface of 16,000 m2 in order to create thepublicly accessible urban beach entertainment complex, and isstrategically located so that it has a minimum surrounding population of500,000 people within a 50-mile radius.

As seen in FIG. 7, an illustrative population density map is shown, bywhich the desired area may be determined in connection with the locationof the vacant and/or underutilized site by analyzing the populationdensity surrounding the location of the potential vacant and/orunderutilized site 21 within a 50-mile radius. FIG. 7 denotes populationdensity by different color and/or pattern intensity within the image,wherein the selected location is surrounded by a dotted circle linerepresenting a 50-mile radius, and wherein the population analysis hasbeen made and it has been determined that such area has a populationdensity of at least 500,000 people.

The urban beach entertainment complex and method for providing efficientutilization of limited use land from the present invention aim to bringa new way of life and transform urban centers into the meeting point ofthe 21^(st) century, completely changing urban centers that have highnearby population and providing those people with the possibility ofbeing immersed in a tropical lifestyle close to their homes. These urbancenters target the nearby surrounding population, aiming for highrepetition rates of people going into the urban beach entertainmentcomplex to have a favorable experience, shop, participate in culturalactivities, watch movies, practice water sports, have lunch or dinner,grab a cup of coffee, or other activities. Creation of such complexesmay very well have an important impact as it is intended that such urbanbeach entertainment complexes will have significant attendance.

A few prophetic embodiments of how some aforementioned venues can beefficiently utilized with the present invention are shown in FIGS. 8A,8B, 9A, 9B, 10A, and 10B. FIGS. 8A and 8B depict one embodiment of thepresent invention, where a horse race track which has a largeunderutilized area inside the track 21 a. The underutilized area shownin FIG. 8A is transformed as shown in FIG. 8B into a beautiful area witha centerpiece tropical-style pristine-clear lagoon 2, creating an urbanbeach entertainment complex 1. FIGS. 9A, 9B, 10A and 10B depict anotherembodiment of the present invention, where a portion of parking lots 21b shown in FIGS. 9A and 10A are converted into an urban beachentertainment complex in FIGS. 9B and 10B having a centerpiecetropical-style pristine-clear lagoon 2.

It will be appreciated that access infrastructure, such as roads andpublic transportation, must be in place to transport visitors to thecomplexes (i.e., in order to be able to reach the complex at reasonablecosts and within a reasonable amount of time).

Additionally, the site can preferably have a predefined water source andsufficient availability for use. The type of water may be fresh,brackish, saline, or seawater, depending on availability. Sources ofwater may be selected from the group comprising the sea, groundwater,potable water, surface water, wells, or others.

The water source should not be contaminated with industrial residualsthat require an extensive industrial pre-treatment and that cannot beremoved with simple and conventional pre-treatment methods such asoxidation or filtration processes. For example, the water source mustpreferably not be contaminated with industrial water residues such asAluminum and hydrocarbons. Extensive industrial pre-treatment systemsusually require the use of large sedimentation basins that also createan industrial appearance—which conflicts with the tropical beachsensation that is an objective of the present invention.

Once the site has been selected, the method creates the development of apublicly accessible urban beach entertainment complex 1 with a largeman-made tropical, pristine-clear lagoon 2 as it centerpiece. The lagoon2 preferably has the look and feel of tropical seas and beaches therebycreating an idyllic beach sensation. The tropical look and feel ambiancerefers to providing a feeling of being in an idyllic setting, with alarge water body and beach area, simulating, for example, the sensationof being in the Caribbean.

The publicly accessible urban beach entertainment complex comprises alow-cost treatment system that provides a water treatment technology fortreating the water in the lagoon wherein if the lagoon has a surface ofless than about 20,000 m2, the water treatment system comprises at leastone centralized filtration system having the capacity to filter thecomplete volume of water within a 24 hours timeframe; and for surfaceslarger than about 20,000 m2, the water treatment system uses at least50% less electricity compared to a conventional swimming poolcentralized filtration systems. The water treatment technology comprisesa filtration system where, if the water body has a surface less thanabout 20,000 m2, the water treatment system comprises at least onecentralized filtration system having the capacity to filter the completevolume of water within a 24 hours timeframe; and for surfaces largerthan about 20,000 m2, it that has a capacity and filtration water volumethat is at least 50% smaller than that of conventional swimming poolfiltration systems (e.g., that filter the complete water volume 4 timesper day). Further, in an embodiment of the invention, the watertreatment technology for operating the centerpiece tropical-style lagoonmust use at least 50% less chemicals than a conventional swimming pooldisinfection system (e.g., that requires maintaining at least 1 ppm ofchlorine permanently throughout the water volume). Therefore, the lagoon2 presents less chemical smell than a conventional pool.

The urban beach entertainment complexes may, for example, be located inpublic parks. However, a physical barrier and/or enclosure must exist tohave a controlled public access into the urban beach entertainmentcomplex 1 or to a portion of it, such as a control system and accesscontrol locations 13.

Additionally, in order for the efficient use of the limited use site,facility or land, the method comprises charging an entry fee to allowaccess to at least a portion of the urban beach entertainment complex.Such fee can be charged previously to visiting the urban beachentertainment complex, or it can be charged on site based onavailability and other factors, such as demand, and total occupationrates, among others. The fees can be variable depending on age, numberof people within groups, seasonality, or others. In addition, fees maybe based on different season, monthly, weekly, or other passes. It willalso be appreciated that electronic ticketing using cell phones andother devices may be used in addition to printed materials and/or cards.It is appreciated that there may also be seasonal passes (such asweekly, monthly, or yearly passes) that may be purchased online orprevious to visiting the urban beach entertainment complex.

In an embodiment of the invention, the centerpiece lagoon andsurrounding facilities can be accessed publicly only after payment of anentry fee collected prior to entry. However, in some embodiments, it maydesirable for at least a portion of the entertainment, cafes, andrestaurant areas to be available to guests without payment of a fee. Inthose embodiments, users of the beach and water sports areas may becharged a fee for access to those areas.

Therefore, the method includes the opportunity to generate revenue forsites that have been underutilized or that have no current use such asvacant land, limited use land, and land that is contiguous or nearbyvenues such as recreational, educational, sports, and commercial venues,by creating a novel beach entertainment complex with a large tropical,pristine-clear lagoon as its centerpiece, and where there is controlledaccess and where a ticket/fee is charged to enter the site.

Based on the population within a 50-mile radius, and the amount ofdemand that the urban beach recreation complex will create, it isexpected that a minimum of 100,000 annual visitors will access thetropical-style setting, preferably 500,000 annual visitors, and a mostpreferred over 1,000,000 visitors per year. Visitors are anticipated andtargeted to be mainly from the surrounding population and are expectedto repeat their visit to the urban beach entertainment complex manytimes. Due to the beautiful and recreational nature of these beach-likesettings that allow relaxing, shopping, practicing water sports,swimming, eating, among other activities, it is expected that annualattendance will be massive, aiming for a large percentage of nearbypopulation, and also an additional percentage of tourists that willattend the publicly accessible urban beach recreational complexes.

It has been calculated that by creating a complex, utilizing theprinciples of the present invention, the number of visitors to such anurban beach entertainment complex may achieve attendance on the order of100,000 to 1,000,000 and up to 6,000,000 visitors per year. Based on themarket and socio-economic status of the cities, the entry fees areexpected to be in the range of USD$5 to USD$150, preferably in the rangeof USD$10 to USD$20, rendering a direct yearly income of USD$1,000,000to USD$120,000,000 only based on access tickets.

Therefore, for example, an urban beach recreational center with atropical-style centerpiece lagoon of 16,000 m² in size, with a yearlyvisitor number of 500,000 persons, and an entry fee of US$15 couldgenerate US$7,500,000 in direct revenue from tickets, where the totalconstruction cost of the centerpiece lagoon would be in the order ofUS$2,400,000 and annual operating costs would be less than $100,000 USDper year (considering chemicals and electricity).

V. Shopping Mall Example

As another prophetic example, it must be noted that the method of thepresent invention can be used in the shopping mall industry, wherein aportion of the parking lots located in currently underutilized shoppingmall space can be transformed into an urban beach entertainment complex.Three scenarios are derived from a project evaluation, including aconservative scenario, a base case scenario, and an upside scenario,wherein revenues and profits associated with installation, operation andentry-fee based access of the urban beach entertainment complex are asfollows in Table 3.

TABLE 3 Description Conservative Base Case Upside Attendance 250,000persons 500,000 persons 750,000 persons per year per year per year EntryTicket US$30 US$30 US$30 Gross Revenue US$30,000,000 US$60,000,000US$90,000,000 Years 1-4 Internal Rate of 67.3% 129.8% 172.1% ReturnReturn on Cost   32%   68%   105%

The scenarios set forth in Table 3 do not consider an event center,large restaurant areas, or sports venues, but does consider ancillariessuch as a beach center with rentals. Therefore, return rates areexpected to reach significant levels, thereby creating a very attractivemarket and investment by enhancing the efficiency of limited use land—inthis case, the parking lot of a current shopping mall.

It is important to note that around the world some locations have beenmodified by for example adding sand on the border of natural rivershaving poor water quality. With only this improvement, more than 500,000people have visited every year. Examples of such places include LujanBeach in Mendoza, Argentina and Encarnacion in Paraguay. But neither ofthe two examples of public access locations have created a meeting pointof the 21^(st) century, where an urban beach entertainment complex witha centerpiece tropical-style pristine-clear lagoon is provided withancillary facilities and wherein there are beach centers, rentals,stages, and similar facilities and amenities to enjoy the day and nightwith family and friends. Also, it is not believed that such locationshave as great an opportunity for profitability as in the presentinvention's method, which based on calculations and economic evaluationshave yield an internal return rate of up to 172% and even more,depending on a specific scenario. The ability of cost-efficientlytransforming limited use land such as underutilized sites or facilities,that are contiguous or nearby recreational, educational, sports, orcommercial venues into a highly profitable business by creating an urbanbeach entertainment complex has never been seen before, and will havegreat social and economic benefits.

The urban beach entertainment complex and method for providing efficientutilization of limited use land from the present invention alsoconsiders including entertainment and commercial amenities into theurban beach entertainment complex, through rental or facilitation ofspace, facilities, services such as food and drinks, activities, orequipment. Therefore, based on studies it is expected that thepreviously calculated income from direct access fees can even doublethrough such ancillary businesses.

Some amenities surrounding the centerpiece tropical-style pristine-clearlagoon comprise:

-   -   Natural and beachfront amphitheaters with stages and spaces for        concerts, e-sports, and others.    -   Large screens for showcasing movies, sport events, conferences,        educational activities, live events, exclusive streaming of        shows and other events, and others.    -   Unique waterfront event centers and venues for conferences,        weddings, tradeshows, fairs, meetings, and others.    -   Food and drink sectors with permanent or temporal facilities        such as bars, restaurants, food trucks, coffee shops, and        others.    -   Sport sectors such as gyms, running trails, soccer fields,        tennis fields, and others.    -   Shopping centers and facilities.    -   Kiosks    -   Rental Centers for coordinating activities or renting equipment.

An amphitheater section 17 a may also be created within the urban beachentertainment complex, wherein the amphitheaters 17 a can house a largescreen 17 b and/or stage 17 c in order to house different activities(See FIG. 1).

Additional activities to be performed using the large tropical-stylepristine-clear lagoon directly or indirectly are: Floating water parkscomprising Wibit® or Aquaglide® facilities, Banana boating, Holographiclight displays, Water shows, Floating stages, among others.

The different activities and shows can be performed live on site or canbe showcased and/or streamed through a large screen configured to beable to be seen by a predetermined number of people. Such activities andshows comprise concerts, shows such as waterskiing shows, drone lightshows, aqua-climb shows, synchronized swimming, ceremonies, movies, TVSeries, documentaries, sports comprising beach volleyball, e-sports,games and gaming activities, competitions comprising drone racing,streaming of live or pre-recorded material, among others.

The beach entertainment complexes can be mostly outdoor, or can be fullyor partially covered with domes or structures that allow year-round usesand activities in locations with strong seasonality, and that allowcreating winter events inside the domes. Such domes can be structural orinflatable, and can be arranged and configured to over the completetropical-style lagoon or a portion thereof.

Additional amenities that are configured within the beach entertainmentcomplex comprise beach cabanas, bars, retail, waterfront or beachfrontterraces, restaurants, food trucks, picnic and BBQ areas.

In an embodiment of the invention, the centerpiece pristine-clear lagoon2 is heated through an external heating system partially or completelyusing the waste heat from an industrial process. For example, thepristine-clear lagoon may be heated indirectly using a heat exchangerthat exchanges hot water from the cooling stage of an industrial orcommercial process with water from the pristine lagoon. The waterheating may be performed through a heating system (not shown) such as aheat exchanger that indirectly transfers the heat from the industrial orcommercial process' cooling stage into the lagoon's water.

In another embodiment of the invention, the bathing zone of thetropical-style man-made lagoon is heated through a heating system thatallows providing heating to the zero-entry beach edge of the lagoon toprovide higher temperature to the water in the bathing area.

In another embodiment of the invention, the make-up water is returnedinto the bathing zones to control the temperature of the water in suchbathing zone, especially in hot weather locations where generally themake-up water will be colder than the water in the centerpiece lagoon,and therefore such make-up water helps cool down such zone.

Additional equipment can be included in the perimeter or within thecenterpiece lagoon in order to generate surface textures and movement ofthe water in the form of aesthetic waves, wherein the aesthetic waves donot have an amplitude of more than 50 cm in most of the lagoon.

VI. Alternative Embodiments

FIG. 1, and FIGS. 8A, 8B, 9A, 9B, 10A and 10B show a plan or aerial viewof a schematic configuration of a first embodiment of the urban beachentertainment complex 1, wherein the complete urban beach entertainmentcomplex 1 is physically enclosed through a physical barrier 16 thatallows having at least one access control location 13 which allowsaccess to the urban beach entertainment complex 1. The centerpiecepristine-clear lagoon 2 has at least one zero-entry beach edge 3 a and asand beach area 6 surrounding at least one portion of the centerpiecelagoon. Amphitheaters 17 a can also be included in the urban beachentertainment complex, facing the centerpiece pristine-clear lagoon 2,that are able to house different entertainment events, and which canalso include a large screen 17 b. The urban beach entertainment complexalso comprises different recreational, educational, commercial venuesand facilities 17 such as an event center 17 d, which can be temporal orpermanent installations.

While the invention has been particularly shown and described withreference to preferred embodiments thereof, it will be understood bythose skilled in the art that various other changes in the form anddetails may be made therein without departing form the spirit and scopeof the invention.

What is claimed is:
 1. A publicly accessible urban beach entertainmentcomplex, the complex comprising: a) a large centerpiece lagoon having asurf portion and a non-surf portion, the non-surf portion of the lagoonhaving a bottom, a perimeter, and a minimum surface area of at leastabout 1,000 m2 to recreate a tropical lifestyle look and feel, andwherein the lagoon further includes: i. at least one bathing zone withinthe non-surf portion of the lagoon, wherein the bathing zone comprises alocalized disinfection system; ii. at least one surf portion comprisingan artificial surf wave generator configured to generate surf waves inthe lagoon; b) at least one sand beach area and a rest area surroundingthe perimeter of the lagoon, wherein the sand of the sand beach area hasa light color thereby resembling a tropical beach; c) a water supplysystem, operatively connected to a water supply, for providing fillingor make-up water for the lagoon; d) a water treatment system arrangedand configured for treating the water in the lagoon wherein if thelagoon has a surface of less than about 20,000 m2, the water treatmentsystem comprises at least one centralized filtration system having thecapacity to filter the complete volume of water within a 24 hourstimeframe; and for surfaces larger than about 20,000 m2, the watertreatment system is arranged and configured to utilize at least 50% lesselectricity compared to a conventional swimming pool centralizedfiltration system, wherein the filtration capacity and filtration watervolume is at least 50% lower than for a conventional swimming poolfiltration system that filters the complete water volume 4 times perday; e) a physical barrier surrounding at least a portion of the urbanbeach entertainment complex, the barrier being arranged and configuredto limit individual access to the complex or its centerpiece lagoon; f)an access control system, wherein the access control system is arrangedand configured to selectively permit entry of individuals into at leasta portion of the urban beach entertainment complex; and g) at least oneancillary facility located within the complex, selected from the groupof commercial, recreational, educational, cultural, residential, sportsand temporary accommodation facilities in order to allow differentevents and activities to be held within the complex.
 2. The publiclyaccessible urban beach entertainment complex of claim 1, wherein atleast a portion of the bottom of the lagoon is constructed with aflexible plastic material.
 3. The publicly accessible urban beachentertainment complex of claim 1, wherein at least 80% of bottom of thelagoon in the water sports zone is constructed with the plasticmaterial.
 4. The publicly accessible urban beach entertainment complexof claim 1, wherein the plastic material is selected from the groupcomprising polyvinyl chloride, polyethylene, rubbers, and polypropylene.5. The publicly accessible urban beach entertainment complex of claim 1,wherein the bottom is constructed with materials to provide layers,comprising plastic liners, shotcrete, and mineral layers the materialsforming the bottom help achieve lower costs than conventional swimmingpools having a concrete bottom.
 6. The publicly accessible urban beachentertainment complex of claim 1, wherein at least a portion of thebottom of the lagoon is constructed with materials having waterproofingand containment properties such as concrete, plaster, stucco, orcombinations thereof.
 7. The publicly accessible urban beachentertainment complex of claim 1, wherein the bottom is constructed toinclude two or more of the bottom materials in layers.
 8. The publiclyaccessible urban beach entertainment complex of claim 1, the largecenterpiece lagoon further comprising at least one water sports zone,the water sports zone comprising a water depth of at least 1.4 meters atits deepest point.
 9. The publicly accessible urban beach entertainmentcomplex of claim 1, wherein the color of the sand in the sand beach areais selected from the following colors according to the RAL color scale:RAL 9001, RAL 9002, RAL 9003, RAL 9010, RAL 9016, RAL 9018, RAL 1001,RAL 1014, or RAL
 1004. 10. The publicly accessible urban beachentertainment complex of claim 1, further comprising a zero-entry edgehaving a a slope between 5% and 30%, whereby the slope resembles anatural beach edge with a soft slope.
 11. The publicly accessible urbanbeach entertainment complex of claim 1, further comprising a localizeddisinfection system in the bathing zone whereby an increased chemicalconcentration is provided in the bathing zone, the localizeddisinfection system including a dispensing outlet arranged andconfigured to apply disinfecting chemicals to the water volume withinthe bathing zone.
 12. The publicly accessible urban beach entertainmentcomplex of claim 11, wherein the localized disinfection system includesdevices selected from the group comprising nozzles, injectors, jets,piping, and outlets.
 13. The publicly accessible urban beachentertainment complex of claim 11, wherein the localized disinfectionsystem is located at the perimeter of the lagoon and generally boundedby the swimming zone, whereby the primary influence of the disinfectingchemicals is mainly within the swimming zone.
 14. The publiclyaccessible urban beach entertainment complex of claim 1, wherein thelocalized disinfection system includes a plurality of dispensingoutlets, with the dispensing outlets being located at the bottom of thelagoon within the swimming zone, whereby the primary influence of thedisinfecting chemicals is mainly within the swimming zone.
 15. Thepublicly accessible urban beach entertainment complex of claim 1,wherein the bottom of the lagoon includes a variety of different slopesand depths.
 16. The publicly accessible urban beach entertainmentcomplex of claim 5, wherein the water sports zone is arranged andconfigured mainly for small watercraft to operate within the watersports zone, and wherein the water sports to be practiced in the watersports zone are selected from the group comprising: sailing, boating,canoeing, rowing, kayaking, water skiing, flyboarding, paddleboarding,parasailing, wakeboarding, windsurfing, kiteboarding, and kitesurfing.17. The publicly accessible urban beach entertainment complex of claim1, wherein the perimeter of the lagoon includes curved shapes and roundcorners, whereby the lagoon resembles a natural water body.
 18. Thepublicly accessible urban beach entertainment complex of claim 1,further including tropical vegetation located in the sand beach area andadditional rest areas, whereby a tropical setting is created
 19. Thepublicly accessible urban beach entertainment complex of claim 1,wherein the surface area of the lagoon is in the range of 1,000 m² to200,000 m².
 20. The publicly accessible urban beach entertainmentcomplex of claim 1, wherein the lagoon has a surface area larger thanabout 20,000 m2 and does not present a noticeable chemical smell in itsmajority as in conventional pools that maintain a permanent residualchlorine level of 1 ppm.
 21. The publicly accessible urban beachentertainment complex of claim 1, wherein the water supply system isarranged and configured to maintain a water volume in the lagoon of atleast 80% of the designed water volume permanently.
 22. The publiclyaccessible urban beach entertainment complex of claim 1, wherein thewater supply system includes devices selected from the group comprising:piping, nozzles, waterfalls, inlets, outlets, and valves.
 23. Thepublicly accessible urban beach entertainment complex of claim 1,wherein the make-up water has iron and manganese concentrations of up to2 ppm and turbidity of up to 8 NTU.
 24. The publicly accessible urbanbeach entertainment complex of claim 1, wherein the water treatmentsystem includes a modular treatment system and wherein the modulartreatment system includes elements selected from the group comprising:containerized machine rooms, skid mounted systems, and water treatmentequipment.
 25. The publicly accessible urban beach entertainment complexof claim 1, wherein the access control system is located in at least aportion of the physical barrier.
 26. The publicly accessible urban beachentertainment complex of claim 1, wherein the access control system islocated anywhere within the premises of the complex.
 27. The publiclyaccessible urban beach entertainment complex of claim 1, wherein theaccess control system is configured to permit entry of individuals intoat least a portion of the urban beach entertainment complex based oninformation received by a ticket, an entry fee, an ID, an ID card, anentry card, a wearable bracelet, by association to an admissionsprogram, through membership, as guests, as participating in activitiesor facilities located within the same complex, or by a mobile phonecarried by the individuals.
 28. The publicly accessible urban beachentertainment complex of claim 1, wherein the ancillary facilitiesinclude event arenas, museums, amusement parks, water parks, stadiums,golf courses, membership clubs, temporary accommodation facilities suchas hotels, zoos, aquariums, shopping centers, university campuses,casinos, cruise ship ports, speed tracks, horse race tracks, and Olympicvenues, among others.
 29. The publicly accessible urban beachentertainment complex of claim 24, wherein the modular treatment systemhas a plug and play configuration.
 30. The publicly accessible urbanbeach entertainment complex of claim 1, wherein the water treatmentsystem is arranged and configured to: a. collect water and storing suchwater in a container having a bottom able to be thoroughly cleaned by asuction device, b. during a 7 day interval, treating the water in thecontainer by periodically adding disinfectant agents to said water toestablish an ORP of at least 500 mV for a period of time dependent onthe temperature of the water being treated, c. activating the operationof mobile suction means in order to suction a portion of said water inthe container containing settled solids to prevent the thickness ofsettled material from exceeding 3 mm, d. filtering such portion of watersuctioned by the mobile suction means and returning the filtered waterto said container, whereby at least 50% less filtration capacity andwater volume is filtered compared to a conventional swimming poolfiltration system are utilized that requires filtering the completewater volume 4 times per day.
 31. The publicly accessible urban beachentertainment complex of claim 1, wherein the water treatment system isarranged and configured to utilize at least 50% less chemicals than aconventional swimming pool disinfection system that requires maintainingat least 1 ppm of chlorine permanently in all of the water volume. 32.The publicly accessible urban beach entertainment complex of claim 1,wherein the lagoon is arranged and configured to create a fetch length,when exposed to the wind, due to the size and length of the lagoon,whereby a natural wave motion is created on the surface of the lagoonwhich is similar to that of natural lakes.
 33. The publicly accessibleurban beach entertainment complex of claim 1, wherein the lagoonoperates in an essentially closed cycle, whereby the water in the lagoonis not significantly renewed from an open body of water.
 34. Thepublicly accessible urban beach entertainment complex of claim 1,wherein the water in the lagoon has a minimum vertical transparency of1.2 meters, whereby the lagoon water transparency resembles the pristineclear waters of tropical seas.
 35. The publicly accessible urban beachentertainment complex of claim 1, wherein evaporation control chemicalsare added to the water of the lagoon, whereby evaporation is reduced upto 50% compared to natural evaporation rates.
 36. The publiclyaccessible urban beach entertainment complex of claim 1, wherein theaccess control system includes at least one location in the physicalbarrier.
 37. The publicly accessible urban beach entertainment complexof claim 36, wherein the access control location includes a controlsystem, wherein the control system is selected from the group comprisinggated entries, turnstiles, access readers, security barriers, biometricsystems.
 38. The publicly accessible urban beach entertainment complexof claim 1, wherein the physical barrier includes at least one elementselected from the group comprising: fences, walls, moats, naturalvegetation, and buildings.
 39. The publicly accessible urban beachentertainment complex of claim 1, wherein the access control system isarranged and configured to allow access to at least 500 people per hourinto the urban beach entertainment complex.
 40. The publicly accessibleurban beach entertainment complex of claim 1, further comprising atleast one ancillary facility selected from the group comprisingamphitheaters having a stage, event centers, kiosks, rental centers,shopping centers, gyms, promenades, sports fields, restaurants, bars,and coffee shops.
 41. The publicly accessible urban beach entertainmentcomplex of claim 1, further comprising at least one beachfrontamphitheater having a stage for hosting and/or showcasing differentevents, educational activities, concerts, cultural activities, sportevents, and similar content.
 42. The publicly accessible urban beachentertainment complex of claim 1, further comprising at least one largescreen on which to project a video image, whereby movies, e-sports,sport events, conferences, simulcasts, live streaming of content, andeducational activities, events, may be shown.
 43. The publiclyaccessible urban beach entertainment complex of claim 1, wherein thelagoon includes an illumination system, whereby use of the lagoon isfacilitated during low light hours or under enclosed structures.
 44. Thepublicly accessible urban beach entertainment complex of claim 43,wherein the illumination system comprises lights located about theperiphery and beneath the surface of the water in the lagoon.
 45. Thepublicly accessible urban beach entertainment complex of claim 1,wherein the lagoon includes at least one dock extending from theperiphery of the lagoon toward a deeper portion of the lagoon, wherebyaccess to the deeper portions is facilitated and enables the practice ofaquatic sports.
 46. The publicly accessible urban beach entertainmentcomplex of claim 1, wherein at least a portion of the entertainmentcomplex is covered with a dome.
 47. The publicly accessible urban beachentertainment complex of claim 46, wherein the dome is selected from thegroup comprising structural or inflatable domes.
 48. The publiclyaccessible urban beach entertainment complex of claim 1, furthercomprising a heating system, wherein at least some of the water in thelagoon is heated.
 49. The publicly accessible urban beach entertainmentcomplex of claim 48, wherein the heating system uses at least part ofthe waste heat from an industrial or commercial cooling process.
 50. Thepublicly accessible urban beach entertainment complex of claim 42,wherein the heating system is arranged and configured to increase thewater temperature in the bathing zone.
 51. The publicly accessible urbanbeach entertainment complex of claim 1, further comprising returning themake-up water into the bathing zone to control the temperature of thewater in the bathing zone.
 52. The publicly accessible urban beachentertainment complex of claim 1, wherein additional equipment isincluded in the perimeter of the lagoon to generate surface textures andmovement of the water in the form of small, aesthetic waves.
 53. Thepublicly accessible urban beach entertainment complex of claim 49,wherein the aesthetic waves do not have an amplitude of more than 50 cm.54. A method for efficiently utilizing limited use land by creating apublicly accessible urban beach entertainment complex, the methodcomprising: a) selecting a site with a minimum total surface of 16,000m2, wherein the site is selected from vacant land, underutilized sites,limited use land, or land that is contiguous or nearby recreational,educational, sports, or commercial venues, has a minimum surroundingpopulation of 500.000 people within a 50-mile radius connected by roadaccess, and has a water supply with sufficient availability for use atthe site; b) constructing a centerpiece lagoon having a surf portion anda non-surf portion, the non-surf portion of the lagoon having a bottom,a perimeter, and a surface area between 1,000 m² and 200,000 m² torecreate a tropical lifestyle look and feel, and wherein the surfportion comprises an artificial surf wave generator configured togenerate surf waves in the surf portion of the lagoon; c) establishingat least one sand beach area and a rest area surrounding the perimeterof the lagoon, wherein the sand of the sand beach area has a light colorthereby resembling a tropical beach; d) connecting a water source to thelagoon with a water supply system, the water supply system providingboth filling and/or make-up water for the lagoon; e) incorporating awater treatment system for treating water in the lagoon, the watertreatment system being arranged and configured for treating the waterwater in the lagoon, wherein if the lagoon has a surface less than20,000 m2, the water treatment system comprises at least one centralizedfiltration system having the capacity to filter the complete volume ofwater within a 24 hours timeframe; and for surfaces of 20,000 m2 andlarger, the water treatment system is configured to utilize at least 50%less electricity compared to a conventional swimming pool centralizedfiltration system, wherein the filtration capacity and filtration watervolume is at least 50% lower than for a conventional swimming poolfiltration system that filters the complete water volume 4 times perday; f) delimiting at least a portion of the publicly accessible urbanbeach entertainment complex with a physical barrier, the barrier beingarranged and configured to limit individual access to the complex; g)establishing at least one ancillary facility located within theentertainment area, selected from the group of commercial, recreational,educational, cultural, residential, sports and temporary accommodationfacilities; h) establishing an access control system wherein the accesscontrol system is arranged and configured to selectively permit entry ofindividuals into at least a portion of the urban beach entertainmentcomplex; and whereby individual entry fees provide revenue for the urbanbeach entertainment complex, thereby providing an efficient use of afacility or land that has limited use.
 55. The method of claim 54,further comprising creating at least one water sports zone within thelagoon, and wherein the water sports zone has a minimum water depth ofat least 1.4 meters at its deepest point.
 56. The method of claim 54,wherein the type of water used from the water source is selected fromthe group comprising: fresh water, brackish water, saline water orseawater.
 57. The method of claim 54, wherein the water source does notinclude aluminum or hydrocarbons, whereby pre-treatment of the water isminimized.
 58. The method of claim 54, wherein the color of the sand isselected from the following colors according to the RAL color scale: RAL9001, RAL 9002, RAL 9003, RAL 9010, RAL 9016, RAL 9018, RAL 1001, RAL1014, and RAL
 1004. 59. The method of claim 54, further includingforming the edges of the lagoon with curved shapes with round corners,whereby the lagoon resembles a natural water body.
 60. The method ofclaim 54, further including placing tropical vegetation in the urbanbeach entertainment complex.
 61. The method of claim 60, wherein thetropical vegetation includes trees and plants and are located in andadjacent to the sand beach area.
 62. The method of claim 54, furtherproviding a modular treatment system for water treatment to the watercontained in the lagoon and wherein the modular treatment system has aplug and play configuration.
 63. The method of claim 54, wherein thewater treatment system is arranged and configured to: a. collect waterand storing such water in a container having a bottom able to bethoroughly cleaned by a suction device, b. during a 7 day interval,treating the water in the container by periodically adding disinfectantagents to said water to establish an ORP of at least 500 mV for a periodof time dependent on the temperature of the water being treated, c.activating the operation of mobile suction means in order to suction aportion of said water in the container containing settled solids toprevent the thickness of settled material from exceeding 3 mm, d.filtering such portion of water suctioned by the mobile suction meansand returning the filtered water to said container, whereby at least 50%less filtration capacity and water volume is filtered compared to aconventional swimming pool filtration system are utilized that requiresfiltering the complete water volume 4 times per day.
 64. The methodaccording to claim 54, further comprising designing the length and sizeof the lagoon such that, when the lagoon is subject to wind, establishesa fetch length, whereby the established fetch length encourages anatural surface wave motion similar to that of natural bodies of water.65. The method of claim 54, further comprising operating the lagoon inan essentially closed cycle manner, wherein the water volume is notsignificantly renewed through recirculation with the water source. 66.The method of claim 54, further comprising maintaining the water in thelagoon such that a minimum vertical transparency of 1.2 meters isestablished, whereby the water in the lagoon resembles the clear waterof tropical seas.
 67. The method of claim 54, further comprising addingevaporation control chemicals to the water in the lagoon, wherebyevaporation is reduced compared to natural evaporation rates.
 68. Themethod of claim 54, further comprising locating at least one accesscontrol system in the physical barrier.
 69. The method of claim 68,wherein the access control location includes a control system selectedfrom the group comprising gated entries, turnstiles, access readers,security barriers, or biometric systems.
 70. The method of claim 68,further comprising locating the access control system relative to thephysical barrier such that access to at least a predetermined portion ofthe urban beach entertainment complex is controlled.
 71. The method ofclaim 54, wherein the physical barrier comprises one or more elementsselected from the group comprising fences, walls, moats, naturalvegetation, and buildings.
 72. The method of claim 54, wherein theaccess control system is configured to allow access to at least 500people per hour into the urban beach entertainment complex.
 73. Themethod of claim 54, further comprising locating an amphitheater having astage within the urban beach entertainment complex, whereby events,educational activities, concerts, cultural activities, and sportingevents may be conducted.
 74. The method of claim 54, further comprisinglocating a video screen in the urban beach entertainment complex forshowing movies, sporting events, conferences, simulcasts, live streamingof content, and educational activities.
 75. The method of claim 54,further comprising an illumination system for the lagoon.
 76. The methodof claim 75, wherein the illumination system comprises LED underwaterstrip lights or underwater spot lights.
 77. The method of claim 54,further comprising constructing a dock in the lagoon, the dock extendingfrom a perimeter of the lagoon toward a deeper portion of the lagoon,whereby the dock enables access to the deeper portion to better enablepracticing water sports.
 78. The method of claim 54, further comprisinga dome over at least a portion of the urban beach entertainment complex.79. The method of claim 78, wherein the dome is selected from structuralor inflatable domes and is arranged and configured to be located over atleast a portion of the lagoon.
 80. The method of claim 54, furthercomprising installing an external heating system to heat water in thelagoon.
 81. The method of claim 80, wherein the external heating systemuses, at least partially, waste heat from an industrial or commercialcooling process.
 82. The method of claim 80, further comprising locatingthe heating system in the bathing zone.
 83. The method of claim 54,further comprising attracting a minimum of 100,000 annual visitors tothe urban beach recreational complex.
 84. The method of claim 54,further comprising locating third party entertainment amenities withinthe urban beach recreational complex.
 85. The method of claim 54,further comprising charging an entry fee to the urban beach recreationalcomplex in the range of $5 to $150 per individual.
 86. The method ofclaim 54, further comprising charging an entry fee to the urban beachrecreational complex in the range of $10 to $20 per individual.
 87. Themethod of claim 54, further comprising designing the lagoon toaccommodate the use of water sports that utilize small watercraft,wherein the water sports are selected from the group comprising:sailing, boating, canoeing, rowing, kayaking, water skiing, flyboarding,paddleboarding, parasailing, wakeboarding, windsurfing, kiteboarding,and kitesurfing.
 88. The method of claim 54, further comprisingestablishing the entry fee based on predetermined factors including age,number of people within groups, and seasonality.
 89. The method of claim54, wherein the entry fee may be paid on site or may be pre-purchased.90. The method of claim 54, wherein the entry fee may be part of aseasonal pass.
 91. The method of claim 54, further comprising locatingsmall wave generating equipment on the perimeter of the lagoon, thesmall wave generating equipment arranged and configured to generatewater surface textures and aesthetic waves.
 92. The method of claim 91,wherein the aesthetic waves have maximum amplitude of 50 cm.
 93. Apublicly accessible urban beach entertainment complex, the complexcomprising: a) a large centerpiece lagoon having a surf portion and anon-surf portion, the non-surf portion of the lagoon having a bottom, aperimeter, and a minimum surface area of at least about 1,000 m2 torecreate a tropical lifestyle look and feel wherein the bottom isconstructed with materials to provide layers, comprising plastic liners,shotcrete, concrete, plaster, stucco, and mineral layers, the materialsforming the bottom help achieve lower costs than conventional swimmingpools having a concrete bottom, and wherein the lagoon further includes:i. at least one bathing zone within the non-surf portion of the lagoon,wherein the bathing zone comprises a localized disinfection system; ii.at least one surf portion comprising an artificial surf wave generatorconfigured to generate surf waves in the lagoon; b) at least one sandbeach area and a rest area surrounding the perimeter of the lagoon,wherein the sand of the sand beach area has a light color therebyresembling a tropical beach; c) a water supply system, operativelyconnected to a water supply, for providing filling or make-up water forthe lagoon; d) a water treatment system arranged and configured fortreating the water in the lagoon wherein if the lagoon has a surface ofless than about 20,000 m2, the water treatment system comprises at leastone centralized filtration system having the capacity to filter thecomplete volume of water within a 24 hours timeframe; and for surfaceslarger than about 20,000 m2, the water treatment system is arranged andconfigured to utilize at least 50% less electricity compared to aconventional swimming pool centralized filtration system, wherein thefiltration capacity and filtration water volume is at least 50% lowerthan for a conventional swimming pool filtration system that filters thecomplete water volume 4 times per day; e) a physical barrier surroundingat least a portion of the urban beach entertainment complex, the barrierbeing arranged and configured to limit individual access to the complexor its centerpiece lagoon; f) an access control system, wherein theaccess control system is arranged and configured to selectively permitentry of individuals into at least a portion of the urban beachentertainment complex; and g) at least one ancillary facility locatedwithin the complex, selected from the group of commercial, recreational,educational, cultural, residential, sports and temporary accommodationfacilities in order to allow different events and activities to be heldwithin the complex.
 94. The publicly accessible urban beachentertainment complex of claim 93, wherein the bottom is constructed toinclude two or more of the bottom materials in layers.
 95. The publiclyaccessible urban beach entertainment complex of claim 93, furthercomprising a zero-entry edge having a slope between 5% and 30%, wherebythe slope resembles a natural beach edge with a soft slope.
 96. Thepublicly accessible urban beach entertainment complex of claim 93,further comprising a localized disinfection system in the bathing zone,the localized disinfection system including a dispensing outlet arrangedand configured to apply disinfecting chemicals to the water volumewithin the bathing zone.
 97. The publicly accessible urban beachentertainment complex of claim 93, wherein the bottom of the lagoonincludes a variety of different slopes and depths.
 98. The publiclyaccessible urban beach entertainment complex of claim 93, wherein theaccess control system is configured to permit entry of individuals intoat least a portion of the urban beach entertainment complex based oninformation received by a ticket, an entry fee, a seasonal pass, thoughmembership, by association to an admissions program, as guests of theancillary facilities, through electronic ticketing, electronic ticketingusing cell phone and other devices, a printed material, a card, amongothers.
 99. The publicly accessible urban beach entertainment complex ofclaim 93, wherein the ancillary facilities include event arenas,museums, amusement parks, water parks, stadiums, golf courses,membership clubs, temporary accommodation facilities such as hotels,zoos, aquariums, shopping centers, university campuses, casinos, cruiseship ports, speed tracks, horse race tracks, and Olympic venues, amongothers.